InChI=1S/C20H18O12/c21-8-5-6-11(22)10(7-8)19(29)30-12-4-2-1-3-9(12)18(28)32-20-15(25)13(23)14(24)16(31-20)17(26)27/h1-7,13-16,20-25H,(H,26,27)