InChI=1S/C31H30O12/c1-12(2)9-19-21-22(33)20-16(32)11-18-15(7-8-31(3,4)43-18)26(20)41-27(21)14-6-5-13(10-17(14)40-19)39-30-25(36)23(34)24(35)28(42-30)29(37)38/h5-11,19,23-25,28,30,32,34-36H,1-4H3,(H,37,38)