InChI=1S/C28H42O3/c1-20(12-8-13-22(3)19-29)10-7-11-21(2)14-9-16-28(6)17-15-25-18-26(30)23(4)24(5)27(25)31-28/h10,13-14,18,29-30H,7-9,11-12,15-17,19H2,1-6H3/b20-10+,21-14+,22-13+/t28-/m0/s1