4-hydroxy-D-proline 4-hydroxy-L-proline CHEBI:18240 4-hydroxy-L-proline HMDB:HMDB0006055 hydroxy-L-proline cis-4-Hydroxy-L-Proline L-Hydroxyproline Wikipedia:4-hydroxy-L-proline CHEBI:11999 CHEBI:1852 (2S)-4-hydroxypyrrolidine-2-carboxylic acid KNApSAcK:C00001370 KEGG:C01015 The L-stereoisomer of 4-hydroxyproline. 4-Hydroxy-L-proline 4-hydroxyproline 4-hydroxy-L-proline zwitterion 4-hydroxy-L-prolinate non-proteinogenic L-alpha-amino acid L-proline derivative