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