InChI=1S/C30H46O4/c1-18(15-20(31)16-19(2)25(33)34)21-9-11-28(6)23-8-7-22-26(3,4)24(32)10-12-29(22)17-30(23,29)14-13-27(21,28)5/h16,18,20-23,31H,7-15,17H2,1-6H3,(H,33,34)/b19-16-