is protonated form of is tautomer of is enantiomer of 4-hydroxy-D-proline 4-hydroxy-L-proline CHEBI:18240 4-hydroxy-L-proline hydroxy-L-proline cis-4-Hydroxy-L-Proline L-Hydroxyproline CHEBI:11999 4-Hydroxy-L-proline CHEBI:1852 (2S)-4-hydroxypyrrolidine-2-carboxylic acid The <small>L</small>-stereoisomer of 4-hydroxyproline. 4-Hydroxy-L-proline 4-hydroxy-L-proline 4-hydroxyproline 4-hydroxy-L-proline zwitterion 4-hydroxy-L-prolinate non-proteinogenic L-alpha-amino acid L-proline derivative