InChI=1S/C33H42O4/c1-21(2)13-14-25-19-32(18-16-23(5)6)29(36)31(17-15-22(3)4)20-30(25,7)33(32,37)26(28(31)35)27(34)24-11-9-8-10-12-24/h8-13,15-16,25,34,37H,14,17-20H2,1-7H3