InChI=1S/C29H25NO9/c1-29(2)28(35)27(22-19(39-29)9-5-13-6-10-20(33)37-25(13)22)38-26-17(31)8-7-15-23(26)30(3)16-11-14(36-4)12-18(32)21(16)24(15)34/h5-12,27-28,31-32,35H,1-4H3