InChI=1/C15H14N2O4/c18-11-3-1-6-16-14(11)15(19)17-10-4-5-12-13(9-10)21-8-2-7-20-12/h1,3-6,9,18H,2,7-8H2,(H,17,19)/p-1/fC15H13N2O4/h18h,17H/q-1 4B11F3D358DEBD7D