5H-isoxazolo[2,3-a]pyrazine-5-acetic acid, hexahydro-2-(methoxycarbonyl)-2-methyl-4-oxo-, methyl ester InChI=1/C12H18N2O6/c1-12(11(17)19-3)6-8-10(16)13(7-9(15)18-2)4-5-14(8)20-12/h8H,4-7H2,1-3H methyl 5-(2-methoxy-2-oxoethyl)-2-methyl-4-oxohexahydro-2H-isoxazolo[2,3-a]pyrazine-2-carboxylate