Record Information
Version1.0
Creation date2010-04-08 22:10:01 UTC
Update date2020-09-17 15:41:35 UTC
Primary IDFDB012163
Secondary Accession NumbersNot Available
Chemical Information
FooDB NameDopamine
DescriptionDopamine, also known as 3-hydroxytyramine or deoxyepinephrine, belongs to the class of organic compounds known as catecholamines and derivatives. Catecholamines and derivatives are compounds containing 4-(2-Aminoethyl)pyrocatechol [4-(2-aminoethyl)benzene-1,2-diol] or a derivative thereof formed by substitution. Dopamine is a drug which is used for the correction of hemodynamic imbalances present in the shock syndrome due to myocardial infarction, trauma, endotoxic septicemia, open-heart surgery, renal failure, and chronic cardiac decompensation as in congestive failure. Dopamine is a very strong basic compound (based on its pKa). Dopamine exists in all living organisms, ranging from bacteria to humans. Within humans, dopamine participates in a number of enzymatic reactions. In particular, dopamine can be biosynthesized from tyramine; which is catalyzed by the enzyme tyrosinase. In addition, dopamine and ascorbic acid can be converted into norepinephrine and dehydroascorbic acid; which is mediated by the enzyme dopamine beta-hydroxylase. Catechol in which the hydrogen at position 4 is substituted by a 2-aminoethyl group. In humans, dopamine is involved in disulfiram action pathway. Outside of the human body, Dopamine is found, on average, in the highest concentration within a few different foods, such as swiss chards, oats, and red beetroots and in a lower concentration in green zucchinis, broccoli, and yellow bell peppers. Dopamine has also been detected, but not quantified in, several different foods, such as potato, banana, avocado, eggplants, and custard apples. This could make dopamine a potential biomarker for the consumption of these foods. Dopamine is a potentially toxic compound. Dopamine, with regard to humans, has been found to be associated with several diseases such as bacterial meningitis, eosinophilic esophagitis, cerebral infarction, and schizophrenia; dopamine has also been linked to the inborn metabolic disorder aromatic l-amino acid decarboxylase deficiency.
CAS Number62-31-7
Structure
Thumb
Synonyms
SynonymSource
2-(3,4-Dihydroxyphenyl)ethylamineChEBI
3,4-DihydroxyphenethylamineChEBI
3-HydroxytyramineChEBI
4-(2-Aminoethyl)-1,2-benzenediolChEBI
4-(2-Aminoethyl)benzene-1,2-diolChEBI
4-(2-Aminoethyl)catecholChEBI
4-(2-Aminoethyl)pyrocatecholChEBI
DeoxyepinephrineChEBI
DopaminaChEBI
DopaminumChEBI
HydroxytyraminChEBI
MedopaKegg
3,4-DihydroxyphenylethylamineHMDB
4-(2-Aminoethyl)-pyrocatecholHMDB
a-(3,4-Dihydroxyphenyl)-b-aminoethaneHMDB
alpha-(3,4-Dihydroxyphenyl)-beta-aminoethaneHMDB
DopaminHMDB
DopastatHMDB
DophamineHMDB
DynatraHMDB
HydroxytyramineHMDB
IntropinHMDB
OxytyramineHMDB
RevivanHMDB
3,4 DihydroxyphenethylamineHMDB
Hydrochloride, dopamineHMDB
Dopamine hydrochlorideHMDB
(3H)-Dopaminebiospider
1,2-Benzenediol, 4-(2-aminoethyl)- (9CI)biospider
3-Hydroxtyraminebiospider
4-(2-Aminoethyl)-1,2-benzenediol, 9CIdb_source
4-(2-aminoethyl)benzene-1,2-diolbiospider
ASL 279db_source
Cardiosterildb_source
NSC 169105db_source
Predicted Properties
PropertyValueSource
Water Solubility7.43 g/LALOGPS
logP-0.4ALOGPS
logP0.03ChemAxon
logS-1.3ALOGPS
pKa (Strongest Acidic)10.01ChemAxon
pKa (Strongest Basic)9.27ChemAxon
Physiological Charge1ChemAxon
Hydrogen Acceptor Count3ChemAxon
Hydrogen Donor Count3ChemAxon
Polar Surface Area66.48 ŲChemAxon
Rotatable Bond Count2ChemAxon
Refractivity43.25 m³·mol⁻¹ChemAxon
Polarizability16.21 ųChemAxon
Number of Rings1ChemAxon
BioavailabilityYesChemAxon
Rule of FiveYesChemAxon
Ghose FilterNoChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
Chemical FormulaC8H11NO2
IUPAC name4-(2-aminoethyl)benzene-1,2-diol
InChI IdentifierInChI=1S/C8H11NO2/c9-4-3-6-1-2-7(10)8(11)5-6/h1-2,5,10-11H,3-4,9H2
InChI KeyVYFYYTLLBUKUHU-UHFFFAOYSA-N
Isomeric SMILESNCCC1=CC(O)=C(O)C=C1
Average Molecular Weight153.1784
Monoisotopic Molecular Weight153.078978601
Classification
Description Belongs to the class of organic compounds known as catecholamines and derivatives. Catecholamines and derivatives are compounds containing 4-(2-Aminoethyl)pyrocatechol [4-(2-aminoethyl)benzene-1,2-diol] or a derivative thereof formed by substitution.
KingdomOrganic compounds
Super ClassBenzenoids
ClassPhenols
Sub ClassBenzenediols
Direct ParentCatecholamines and derivatives
Alternative Parents
Substituents
  • Catecholamine
  • Phenethylamine
  • 2-arylethylamine
  • 1-hydroxy-4-unsubstituted benzenoid
  • 1-hydroxy-2-unsubstituted benzenoid
  • Aralkylamine
  • Monocyclic benzene moiety
  • Amine
  • Hydrocarbon derivative
  • Primary amine
  • Organopnictogen compound
  • Organooxygen compound
  • Organonitrogen compound
  • Primary aliphatic amine
  • Organic oxygen compound
  • Organic nitrogen compound
  • Aromatic homomonocyclic compound
Molecular FrameworkAromatic homomonocyclic compounds
External Descriptors
Ontology
Physiological effect

Health effect:

Disposition

Route of exposure:

Source:

Biological location:

Role

Indirect biological role:

Industrial application:

Physico-Chemical Properties
Physico-Chemical Properties - Experimental
PropertyValueReference
Physical stateSolid
Physical DescriptionNot Available
Mass CompositionC 62.73%; H 7.24%; N 9.14%; O 20.89%DFC
Melting Point128 oC
Boiling PointNot Available
Experimental Water SolubilityNot Available
Experimental logP-0.98HANSCH,C ET AL. (1995)
Experimental pKa8.93
Isoelectric pointNot Available
Charge+1
Optical RotationNot Available
Spectroscopic UV DataNot Available
DensityNot Available
Refractive IndexNot Available
Spectra
Spectra
EI-MS/GC-MS
TypeDescriptionSplash KeyView
EI-MSMass Spectrum (Electron Ionization)splash10-00e9-8900000000-88acdc978fe4a64e0fc52014-09-20View Spectrum
GC-MSDopamine, non-derivatized, GC-MS Spectrumsplash10-00di-1900000000-117a1a7207245f5377e7Spectrum
GC-MSDopamine, 4 TMS, GC-MS Spectrumsplash10-00di-1900000000-8b7dcae82868308513daSpectrum
GC-MSDopamine, non-derivatized, GC-MS Spectrumsplash10-00di-1900000000-117a1a7207245f5377e7Spectrum
GC-MSDopamine, non-derivatized, GC-MS Spectrumsplash10-00di-1900000000-8b7dcae82868308513daSpectrum
Predicted GC-MSDopamine, non-derivatized, Predicted GC-MS Spectrum - 70eV, Positivesplash10-001i-8900000000-752bc8c11fa321b8a7acSpectrum
Predicted GC-MSDopamine, 2 TMS, Predicted GC-MS Spectrum - 70eV, Positivesplash10-0089-9280000000-c894c19dda88ac048dd4Spectrum
Predicted GC-MSDopamine, non-derivatized, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MSDopamine, TMS_1_1, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MSDopamine, TMS_1_2, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MSDopamine, TMS_1_3, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MSDopamine, TMS_2_2, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MSDopamine, TMS_2_3, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MSDopamine, TMS_2_4, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MSDopamine, TBDMS_1_1, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MSDopamine, TBDMS_1_2, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MSDopamine, TBDMS_1_3, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MSDopamine, TBDMS_2_1, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MSDopamine, TBDMS_2_2, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MSDopamine, TBDMS_2_3, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MSDopamine, TBDMS_2_4, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
MS/MS
TypeDescriptionSplash KeyView
MS/MSLC-MS/MS Spectrum - Quattro_QQQ 10V, Positive (Annotated)splash10-0uxu-4900000000-ff51177ebcb89b8c956c2012-07-24View Spectrum
MS/MSLC-MS/MS Spectrum - Quattro_QQQ 25V, Positive (Annotated)splash10-0006-9200000000-a554eb700a06cecb82922012-07-24View Spectrum
MS/MSLC-MS/MS Spectrum - Quattro_QQQ 40V, Positive (Annotated)splash10-014l-9000000000-db9813e1025f237a549b2012-07-24View Spectrum
MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 10V, Negativesplash10-0udi-0900000000-27e0d71db6d14d79759c2012-08-31View Spectrum
MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 20V, Negativesplash10-0uk9-0900000000-f1cf97c0d0dd509e229e2012-08-31View Spectrum
MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 30V, Negativesplash10-00di-0900000000-aa09a2411e287abe74ed2012-08-31View Spectrum
MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 40V, Negativesplash10-00di-1900000000-97c42b109cab2005373d2012-08-31View Spectrum
MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 50V, Negativesplash10-006x-9700000000-974bd18febffcceea2d62012-08-31View Spectrum
MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 10V, Positivesplash10-0f79-0900000000-099173d4201beca9e5482012-08-31View Spectrum
MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 20V, Positivesplash10-000i-1900000000-9dc09f2661247c9d84b02012-08-31View Spectrum
MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 30V, Positivesplash10-0006-9300000000-8b85fa9aac1ffb4c28732012-08-31View Spectrum
MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 40V, Positivesplash10-0006-9000000000-9ea16d2057010279d4332012-08-31View Spectrum
MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 50V, Positivesplash10-014l-9000000000-32ca2db8fe2b4729ab942012-08-31View Spectrum
MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 10V, Positivesplash10-0f79-0900000000-ff587935c79b4592ffcf2012-08-31View Spectrum
MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 20V, Positivesplash10-000i-1900000000-8a35d8a2241bc18d6c502012-08-31View Spectrum
MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 30V, Positivesplash10-0006-9300000000-356a4b8f268863c7893e2012-08-31View Spectrum
MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 40V, Positivesplash10-0006-9000000000-a88c1004f357858fbc6c2012-08-31View Spectrum
MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 50V, Positivesplash10-014l-9000000000-271874005dcb902885122012-08-31View Spectrum
MS/MSLC-MS/MS Spectrum - LC-ESI-QFT , negativesplash10-0udi-0900000000-cfa7e1cb9f02ffb4447d2017-09-14View Spectrum
Predicted MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-0udr-0900000000-4e409c6edda911de39fe2017-06-28View Spectrum
Predicted MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-000i-1900000000-90aa0e0866454c2eacc72017-06-28View Spectrum
Predicted MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-1000-9400000000-210fd696305d8cf761642017-06-28View Spectrum
Predicted MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-0udi-0900000000-ff95007680e484d3c57e2017-06-28View Spectrum
Predicted MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-0udi-1900000000-6dcfecebbd98220ef7462017-06-28View Spectrum
Predicted MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-0kil-6900000000-f476cfd569c441bc84aa2017-06-28View Spectrum
NMR
TypeDescriptionView
1D NMR1H NMR Spectrum (1D, 600 MHz, H2O, experimental)Spectrum
1D NMR1H NMR Spectrum (1D, 100 MHz, D2O, predicted)Spectrum
1D NMR13C NMR Spectrum (1D, 100 MHz, D2O, predicted)Spectrum
1D NMR1H NMR Spectrum (1D, 1000 MHz, D2O, predicted)Spectrum
1D NMR13C NMR Spectrum (1D, 1000 MHz, D2O, predicted)Spectrum
1D NMR1H NMR Spectrum (1D, 200 MHz, D2O, predicted)Spectrum
1D NMR13C NMR Spectrum (1D, 200 MHz, D2O, predicted)Spectrum
1D NMR1H NMR Spectrum (1D, 300 MHz, D2O, predicted)Spectrum
1D NMR13C NMR Spectrum (1D, 300 MHz, D2O, predicted)Spectrum
1D NMR1H NMR Spectrum (1D, 400 MHz, D2O, predicted)Spectrum
1D NMR13C NMR Spectrum (1D, 400 MHz, D2O, predicted)Spectrum
1D NMR1H NMR Spectrum (1D, 500 MHz, D2O, predicted)Spectrum
1D NMR13C NMR Spectrum (1D, 500 MHz, D2O, predicted)Spectrum
1D NMR1H NMR Spectrum (1D, 600 MHz, D2O, predicted)Spectrum
1D NMR13C NMR Spectrum (1D, 600 MHz, D2O, predicted)Spectrum
1D NMR1H NMR Spectrum (1D, 700 MHz, D2O, predicted)Spectrum
1D NMR13C NMR Spectrum (1D, 700 MHz, D2O, predicted)Spectrum
1D NMR1H NMR Spectrum (1D, 800 MHz, D2O, predicted)Spectrum
1D NMR13C NMR Spectrum (1D, 800 MHz, D2O, predicted)Spectrum
1D NMR1H NMR Spectrum (1D, 900 MHz, D2O, predicted)Spectrum
1D NMR13C NMR Spectrum (1D, 900 MHz, D2O, predicted)Spectrum
2D NMR[1H, 13C]-HSQC NMR Spectrum (2D, 600 MHz, H2O, experimental)Spectrum
ChemSpider ID661
ChEMBL IDCHEMBL59
KEGG Compound IDC03758
Pubchem Compound ID681
Pubchem Substance IDNot Available
ChEBI ID18243
Phenol-Explorer IDNot Available
DrugBank IDDB00988
HMDB IDHMDB00073
CRC / DFC (Dictionary of Food Compounds) IDHDV99-C:HDV99-C
EAFUS IDNot Available
Dr. Duke ID3-HYDROXYTYRAMINE|DOPAMINE
BIGG ID42467
KNApSAcK IDC00001408
HET IDLDP
Food Biomarker OntologyNot Available
VMH IDNot Available
Flavornet IDNot Available
GoodScent IDNot Available
SuperScent IDNot Available
Wikipedia IDDopamine
Phenol-Explorer Metabolite IDNot Available
Duplicate IDSNot Available
Old DFC IDSNot Available
Associated Foods
FoodContent Range AverageReference
FoodReference
Biological Effects and Interactions
Health Effects / Bioactivities
DescriptorIDDefinitionReference
Adrenergic37962 An agent that stimulates the adrenergic nervous system, mimicking the effects of adrenaline. It plays a biological role in regulating heart rate, blood pressure, and energy. Therapeutically, adrenergic agents are used to treat conditions such as asthma, hypertension, and cardiac arrest, with key medical uses including bronchodilation, vasoconstriction, and increased cardiac output.DUKE
Anti lactagogueAn agent that decreases milk production, used to suppress lactation in women, particularly after childbirth or abortion, or to treat conditions like galactorrhea (spontaneous milk flow).DUKE
Anti myocontractantAn agent that relaxes smooth muscle, reducing muscle contractions. It has therapeutic applications in treating conditions like spasms, hypertension, and respiratory issues, with key medical uses including relieving asthma symptoms and managing gastrointestinal disorders.DUKE
Anti neurogenicAn agent that impairs neural growth factor, inhibiting nerve growth and regeneration. It plays a biological role in reducing pain transmission and has therapeutic applications in managing chronic pain, cancer, and neurological disorders, with key medical uses including pain management and tumor treatment.DUKE
Anti-Parkinsonian48407 An agent that alleviates symptoms of Parkinson's disease, enhancing dopamine levels and improving motor function, commonly used to manage tremors, rigidity, and bradykinesia in neurodegenerative disorders.DUKE
Anti prolactinAn agent that inhibits prolactin production, a hormone regulating lactation and reproductive processes. Therapeutically, it's used to treat hyperprolactinemia, prolactinomas, and associated disorders, such as galactorrhea, infertility, and menstrual irregularities.DUKE
Anti-shockAn agent that stabilizes blood pressure and circulation, reducing the effects of shock. Therapeutically, it's used to manage hypovolemic shock, anaphylactic shock, and septic shock, helping to prevent organ failure and promote recovery. Key medical uses include treatment of severe blood loss, burns, and trauma.DUKE
Anti-thyreotropicAn antibody that inhibits thyrotropin, regulating thyroid hormone production. It has therapeutic applications in managing thyroid disorders, such as hyperthyroidism, and key medical uses include treating conditions like Graves' disease.DUKE
Cardiotonic38070 An agent that strengthens heart muscle contractions, enhancing cardiac output. It plays a biological role in regulating heart function and is therapeutically used to treat heart failure, improving symptoms and exercise tolerance. Key medical uses include managing cardiomyopathy, atrial fibrillation, and congestive heart failure.DUKE
Diuretic35498 An agent that increases urine production, helping remove excess fluids and salts from the body. It plays a key biological role in regulating fluid balance and blood pressure. Therapeutically, diuretics are used to treat conditions such as hypertension, edema, and heart failure, helping reduce swelling and lower blood pressure.DUKE
HypertensiveAn agent that increases blood pressure, used therapeutically to treat hypotension (low blood pressure) and shock, and medically to manage conditions such as orthostatic hypotension and postural hypotension.DUKE
InotropicAn agent that alters the force or energy of muscular contractions, particularly in the heart. It has therapeutic applications in treating heart failure and cardiogenic shock. Positively inotropic agents, such as digoxin, increase contraction strength, while negatively inotropic agents, like beta blockers, weaken it, commonly used to manage arrhythmias and hypertension.DUKE
MyocontractantAn agent that stimulates contractions of smooth muscle, playing a biological role in regulating muscle tone. Therapeutically, it has applications in treating conditions like uterine atony and gastrointestinal disorders. Key medical uses include inducing labor, managing postpartum hemorrhage, and treating gastrointestinal motility issues.DUKE
NatriureticAn agent that promotes the excretion of sodium in the urine, aiding in blood pressure regulation and fluid balance. It plays a biological role in managing hypertension and heart failure, with therapeutic applications in treating edema and cardiovascular diseases. Key medical uses include diuretic therapy and management of congestive heart failure.DUKE
Neurotransmitter25512 A chemical messenger that transmits signals between neurons, regulating various physiological and psychological processes. Therapeutically, neurotransmitter modulators are used to treat conditions such as depression, anxiety, and Parkinson's disease, by altering neurotransmitter levels or activity to restore balance and alleviate symptoms.DUKE
PriapisticA condition characterized by persistent, usually painful erection of the penis, often due to disease. It has no direct therapeutic applications, but treatments for priapism include medications to reduce erection, such as phenylephrine, and are used to manage conditions like sickle cell disease, leukemia, and erectile dysfunction.DUKE
Sympathomimetic35524 An agent that mimics the effects of the sympathetic nervous system, increasing heart rate, blood pressure, and energy. Therapeutically, it's used to treat conditions like asthma, hypotension, and shock, as well as nasal decongestion and eye dilation.DUKE
Teratogenic50905 An agent that causes abnormal fetal development, disrupting embryonic growth and leading to birth defects. Its biological role is associated with developmental toxicity, and it has no therapeutic applications. Key medical uses include serving as a warning for substances that pose risks during pregnancy, guiding prenatal care and medication management to prevent birth defects.DUKE
Vasoconstrictor50514 An agent that narrows blood vessels, reducing blood flow. It plays a biological role in regulating blood pressure and is therapeutically used to treat conditions like hypotension, nasal congestion, and bleeding. Key medical uses include managing shock, reducing bleeding during surgery, and relieving migraine headaches.DUKE
Vasodilator35620 An agent that widens blood vessels, reducing blood pressure and increasing blood flow. It plays a biological role in regulating cardiovascular function. Therapeutically, vasodilators are used to treat conditions such as hypertension, angina, and heart failure, improving oxygen delivery and reducing cardiac workload.DUKE
Dopaminergic48560 An agent that stimulates or regulates dopamine activity, playing a key role in movement, motivation, and reward processing. Therapeutically, dopaminergic agents are used to manage Parkinson's disease, restless leg syndrome, and certain psychiatric disorders, such as schizophrenia and depression.CHEBI
Enzymes
NameGene NameUniProt ID
Aromatic-L-amino-acid decarboxylaseDDCP20711
D(2) dopamine receptorDRD2P14416
D(4) dopamine receptorDRD4P21917
Pathways
NameSMPDB LinkKEGG Link
Catecholamine BiosynthesisSMP00012 map00350
Tyrosine MetabolismSMP00006 map00350
MetabolismNot Available
BiosynthesisNot Available
Organoleptic Properties
FlavoursNot Available
Files
MSDSNot Available
References
Synthesis ReferenceNot Available
General ReferenceNot Available
Content Reference— Duke, James. 'Dr. Duke's Phytochemical and Ethnobotanical Databases. United States Department of Agriculture.' Agricultural Research Service, Accessed April 27 (2004).
— Shinbo, Y., et al. 'KNApSAcK: a comprehensive species-metabolite relationship database.' Plant Metabolomics. Springer Berlin Heidelberg, 2006. 165-181.