InChI=1/C25H20O17/c26-9-4-12(28)10-6-15(20(39-14(10)5-9)8-1-2-11(27)13(29)3-8)40-25-19(32)18(31)17(30)16(41-25)7-38-23(36)24(37)42-22(35)21(33)34/h1-6,16-19,25,30-32H,7H2,(H4-,26,27,28,29,33,34,36,37)