InChI=1S/C34H30O9/c35-23-13-7-12-21(16-23)27-26-22(15-14-19-8-3-1-4-9-19)17-24(18-25(26)42-31(27)20-10-5-2-6-11-20)41-34-30(38)28(36)29(37)32(43-34)33(39)40/h1-18,27-32,34-38H,(H,39,40)/b15-14+