g-Methyl L-glutamate N-carboxyanhydride, N-Carboxy-L-glutamic anhydride g-methyl ester, 5-Methyl L-glutamate N-carboxyanhydride, g-Methyl L-glutamate-N-carboxylic acid anhydride, N-Carboxy-g-methyl-L-glutamic anhydride, L-Glutamicacid g-methyl ester N-carboxyanhydride