InChI=1S/C34H30O9/c35-23-16-22(15-14-19-8-3-1-4-9-19)26-25(18-23)42-31(20-10-5-2-6-11-20)27(26)21-12-7-13-24(17-21)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+