InChI=1S/C25H34O3/c1-19(10-7-8-11-21(3)18-26)12-9-13-20(2)14-15-23-24(4,5)16-22(27)17-25(23,6)28/h7-14,18,22,27-28H,16-17H2,1-6H3/b8-7+,12-9+,19-10+,20-13+,21-11+/t15?,22-,25+/m0/s1