5-Oxo-DL-proline, compound with 2,2',2''-nitrilotriethanol (1:1) 55901-20-7 DL-2-Pyrrolidone-5-carboxylic acid, triethanolamine salt DL-Proline, 5-oxo-, compd. with 2,2',2''-nitrilotris(ethanol) (1:1) EINECS 259-883-8 Proline, 5-oxo-, compd. with 2,2',2''-nitrilotris(ethanol) (1:1) TEA-PCA Triethanolamine-dl-2-pyrrolidone-5-carboxylate