InChI=1S/C27H44O4/c1-16(6-5-7-17(2)25(30)31)20-8-9-21-24-22(11-13-27(20,21)4)26(3)12-10-19(28)14-18(26)15-23(24)29/h17-24,28-29H,1,5-15H2,2-4H3,(H,30,31)/t17?,18-,19?,20+,21-,22-,23?,24?,26-,27+/m0/s1