InChI=1/C31H26N2O4/c1-21-6-5-7-23(18-21)20-37-26-12-10-25(11-13-26)29(34)27-28(24-8-3-2-4-9-24)33(31(36)30(27)35)19-22-14-16-32-17-15-22/h2-18,28,35H,19-20H2,1H3/p-1/t28-/m1/s1/fC31H25N2O4/h35h/q-1 19BC1BDE76B2145C