InChI=1S/C21H20O12/c1-30-13-6-12-10(14(23)15(13)24)5-11(32-12)7-2-8(22)4-9(3-7)31-21-18(27)16(25)17(26)19(33-21)20(28)29/h2-6,16-19,21-27H,1H3,(H,28,29)