5-isoxazolecarboxylic acid, 2,3-dihydro-2-methyl-3-oxo-, methyl ester InChI=1/C6H7NO4/c1-7-5(8)3-4(11-7)6(9)10-2/h3H,1-2H methyl 2-methyl-3-oxo-2,3-dihydroisoxazole-5-carboxylate