InChI=1S/C29H48O4/c1-17(2)20(5)18(3)14-19(4)22-8-9-23-24-15-25(31)29(33)16-21(30)10-11-27(29,7)28(24,32)13-12-26(22,23)6/h14-15,17,19-23,25,30-33H,8-13,16H2,1-7H3/b18-14+