dimethyl [(6S,7R,7aS)-6-acetyl-3-oxotetrahydro-1H-pyrrolo[1,2-c][1,3]oxazol-7-yl]malonate

((6R,7S,7aS)-6-Acetyl-3-oxo-tetrahydro-pyrrolo[1,2-c]oxazol-7-yl)-acetic acid methyl ester