InChI=1S/C21H20O12/c22-6-3-9(23)12-8-5-30-18-7(17(8)31-11(12)4-6)1-2-10(13(18)24)32-21-16(27)14(25)15(26)19(33-21)20(28)29/h1-4,8,14-17,19,21-27H,5H2,(H,28,29)