InChI=1S/C28H48O4/c1-15(2)16(3)25(31)26(32)17(4)20-9-10-21-19-8-7-18-13-23(29)24(30)14-28(18,6)22(19)11-12-27(20,21)5/h15,17-26,29-32H,3,7-14H2,1-2,4-6H3