InChI=1/C21H18N2O4/c22-13-14-4-3-5-17(12-14)27-16-10-8-15(9-11-16)23-20(24)18-6-1-2-7-19(18)21(25)26/h1-5,8-12,18-19H,6-7H2,(H,23,24)(H,25,26)/p-1/t18-,19-/m0/s1/fC21H17N2O4/h23H/q-1 AD1336D8F19E20FE