InChI=1S/C27H38O2/c1-20(2)10-11-21(3)12-13-22(4)14-15-23(5)16-17-24(6)18-19-25-8-7-9-26(28)27(25)29/h7-10,12,14,16,18,28-29H,11,13,15,17,19H2,1-6H3/b21-12+,22-14+,23-16+,24-18+