6H-1,3,4-oxadiazine-2-carboxylic acid, 6-oxo-5-phenyl-, methyl ester InChI=1/C11H8N2O4/c1-16-11(15)9-13-12-8(10(14)17-9)7-5-3-2-4-6-7/h2-6H,1H methyl 6-oxo-5-phenyl-6H-1,3,4-oxadiazine-2-carboxylate