InChI=1S/C21H20O12/c22-12-10(31-20-16(26)14(24)15(25)17(32-20)19(28)29)6-9-11(13(12)23)18(27)21(30,33-9)7-8-4-2-1-3-5-8/h1-6,14-17,20,22-26,30H,7H2,(H,28,29)