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/h7,16,18-24,28-29H,5-6,8-15H2,1-4H3,(H,30,31)/b17-7+/t16-,18+,19-,20-,21+,22+,23+,24+,26+,27-/m1/s1