InChI=1/C16H15NO4/c1-10-7-12(16(18)19)9-17-15(10)11-3-4-13-14(8-11)21-6-2-5-20-13/h3-4,7-9H,2,5-6H2,1H3,(H,18,19)/p-1/fC16H14NO4/q-1 5A21E16F4E6515BB