InChI=1S/C20H28O12/c1-8-12(21)14(23)16(25)19(30-8)29-7-11-13(22)15(24)17(26)20(32-11)31-10-6-4-3-5-9(10)18(27)28-2/h3-6,8,11-17,19-26H,7H2,1-2H3