InChI=1/C16H12N2O3/c19-16(20)10-5-6-11-12(7-10)18-15(17-11)14-8-9-3-1-2-4-13(9)21-14/h1-7,14H,8H2,(H,17,18)(H,19,20)/p-1/t14-/m1/s1/fC16H11N2O3/h18H/q-1 71E1B203F4D99965