InChI=1S/C31H44O4/c1-21(11-8-12-22(2)15-10-16-24(4)31(34)35)13-9-14-23(3)19-20-26-25(5)29(32)27-17-6-7-18-28(27)30(26)33/h6-7,17-19,21-22,24H,8-16,20H2,1-5H3,(H,34,35)/b23-19+/t21-,22+,24?/m1/s1