InChI=1S/C24H38O4/c1-15(9-7-11-16(2)23(26)27)10-8-13-24(6)14-12-20-19(5)21(25)17(3)18(4)22(20)28-24/h15-16,25H,7-14H2,1-6H3,(H,26,27)/t15-,16?,24-/m0/s1