InChI=1S/C30H48O4/c1-18(25(33)34)7-8-21(31)19(2)20-11-13-28(6)23-10-9-22-26(3,4)24(32)12-14-29(22)17-30(23,29)16-15-27(20,28)5/h7,19-24,31-32H,8-17H2,1-6H3,(H,33,34)/b18-7-