(2S)-pyrrolidine-2-carboxylic acid; (-)-2-Pyrrolidinecarboxylic Acid; (-)-Proline; (S)-(-)-Proline; (S)-2-Carboxypyrrolidine; (S)-2-Pyrrolidinecarboxylic Acid; (S)-Proline; 2-Pyrrolidinecarboxylic Acid; 2-Pyrrolidinecarboxylic Acid, (S)-; Carboxypyrrolidine; L-(-)-Proline; L-Pyrrolidine-2-carboxylic Acid; L-α-Pyrrolidinecarboxylic Acid