InChI=1S/C20H26O6/c1-10-5-18-8-20(10,25)4-3-12(18)19-7-11(21)6-17(2,16(24)26-9-19)14(19)13(18)15(22)23/h11-14,21,25H,1,3-9H2,2H3,(H,22,23)