4-[(4-nitrobenzoyl)amino]benzoic acid InChI=1/C14H10N2O5/c17-13(9-3-7-12(8-4-9)16(20)21)15-11-5-1-10(2-6-11)14(18)19/h1-8H,(H,15,17)(H,18,19 benzoic acid, 4-[(4-nitrobenzoyl)amino]-