InChI=1S/C28H20O12/c29-11(9-19(34)35)7-8-15(30)12-3-1-5-16(31)20(12)27(38)24-22-14(10-18(33)23(24)28(39)40)25(36)13-4-2-6-17(32)21(13)26(22)37/h1-6,10-11,29,31-33H,7-9H2,(H,34,35)(H,39,40)/t11-/m1/s1