InChI=1/C13H11NO4/c1-16-13-11-8(4-5-17-11)9(6-14)7-2-3-10(15)18-12(7)13/h2-5H,6,14H2,1H3/p+1/fC13H12NO4/h14H/q+1 9EC8A191FEDE7E82