InChI=1S/C28H21F4NO7/c29-26(30)37-17-6-7-18-19(13-21(38-22(18)12-17)14-1-3-15(4-2-14)24(34)35)33-25(36)27(9-10-27)16-5-8-20-23(11-16)40-28(31,32)39-20/h1-8,11-12,19,21,26H,9-10,13H2,(H,33,36)(H,34,35)/t19-,21-/m1/s1