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