InChI=1/C13H14N2O4/c16-12(17)5-4-10-2-1-3-11(14-10)15-13(18)9-6-7-19-8-9/h1-5,9H,6-8H2,(H,16,17)(H,14,15,18)/p-1/b5-4+/t9-/m0/s1/fC13H13N2O4/h15H/q-1 2D8BA70E303BFA3B