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