InChI=1S/C20H26O4/c1-5-6-13-10-16(21)18(19(22)17(13)20(23)24)15-9-12(4)7-8-14(15)11(2)3/h9-10,14-15,21-22H,2,5-8H2,1,3-4H3,(H,23,24)/t14-,15+/m0/s1