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