InChI=1/C16H11NO4/c17-9-5-6-12-13(18)8-15(21-14(12)7-9)10-3-1-2-4-11(10)16(19)20/h1-8H,17H2,(H,19,20)/p-1/fC16H10NO4/q-1 1AD62261206E1BEE