InChI=1S/C34H52O7/c1-19(11-10-12-20(2)30(38)39)24-17-28(41-22(4)36)34(9)29-23(13-16-33(24,34)8)32(7)15-14-27(40-21(3)35)31(5,6)26(32)18-25(29)37/h12,19,24-28,37H,10-11,13-18H2,1-9H3,(H,38,39)/b20-12-