InChI=1/C17H16N2O4/c1-11-9-16(20)23-15-10-12(4-5-14(11)15)19-17(21)18-7-6-13-3-2-8-22-13/h2-5,8-10H,6-7H2,1H3,(H2,18,19,21)/f/h18-19H B5FFD317C79A50F5