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