Similar names: (4R)-4-Hydroxy-L-proline; L-Proline, 4-hydroxy-, trans-; Proline, 4-hydroxy-, L- (8CI); (4R)-4-Hydroxy-L-proline; (-)-4-Hydroxy-2-pyrrolidinecarboxylic acid; (2S,4R)-(-)-4-Hydroxyproline; (2S,4R)-4-Hydroxyproline; (2S,4R)-4-Hydroxypyrrolidine-2-carboxylic acid; (2S,4R)-4-Hydroxypyrrolidine-2-carboxylic acid; (R)-4-Hydroxy-(S)-proline; (R)-4-Hydroxy-L-proline; (S)-Hydroxyproline; 4(R)-Hydroxy-2(S)-pyrrolidinecarboxylic acid; 4(R)-Hydroxyproline; 4-Hydroxy-(S)-proline; 4-Hydroxy-L-proline; 4-Hydroxyproline; 4-trans-Hydroxy-L-proline; Hydroxy-L-proline; Hydroxyproline; Hypro; L-4-Hydroxyproline; L-Hydroxyproline; L-Hypro; L-trans-4-Hydroxyproline; Ls-Hydroxyproline; NSC 46704; Proline, 4-hydroxy-; trans-4-Hydroxy-L-proline; trans-4-Hydroxyproline; trans-L-4-Hydroxyproline; trans-L-Hydroxyproline; δ-Hydroxyproline