BUTYL L-PYROGLUTAMATE;BUTYL (S)-(-)-2-PYRROLIDONE-5-CARBOXYLATE;butyl 5-oxo-L-prolinate;(S)-5-Oxo-2α-pyrrolidinecarboxylic acid butyl ester;5-Oxo-L-proline butyl ester;Einecs 225-568-9
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