InChI=1S/C33H26O17/c34-15-6-12(7-16(35)22(15)23(38)11-4-2-1-3-5-11)48-33-29(44)28(43)30-19(49-33)10-47-31(45)13-8-17(36)24(39)26(41)20(13)21-14(32(46)50-30)9-18(37)25(40)27(21)42/h1-9,19,28-30,33-37,39-44H,10H2