618-27-9 L-Allohydroxyproline L-Proline, 4-hydroxy-, cis- L-Proline, allo-hydroxy- NSC206274 Proline, 4-allo-hydroxy-, L- allo-4-Hydroxy-L-proline allo-4-Hydroxyproline allo-L-Hydroxyproline cis-4-Hydroxy-L-proline cis-4-Hydroxyproline cis-Hydroxyproline