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cis-4-Hydroxy-D-proline2584-71-6100 % similar (2R,4S)-4-Hydroxypyrrolidine-2-carboxylic acid3398-22-9100 % similar Hydroxyproline51-35-4100 % similar cis-4-Hydroxy-L-proline618-27-9100 % similar (2R,4S)-4-Hydroxypyrrolidine-2-carboxylic acid hydrochloride142347-81-788 % similar (2R,4R)-4-Hydroxypyrrolidine-2-carboxylic acid hydrochloride77449-94-688 % similar (2R,4S)-4-Fluoropyrrolidine-2-carboxylic acid131176-02-860 % similar (2S,4S)-4-Fluoro-pyrrolidine-2-carboxylic acid2438-57-560 % similar (4R)-4-Fluoro-L-proline2507-61-160 % similar (4S)-4-Cyclohexyl-L-proline103201-78-155 % similar (4R)-4-Fluoro-L-proline hcl60604-36-655 % similar 3-Hydroxycyclobutanecarboxylic acid194788-10-850 % similar (4R)-4-(1,1-Dimethylethoxy)-L-proline79775-07-850 % similar trans-4-Cyclohexyl-L-proline hydrochloride90657-55-950 % similar (2R,4R)-4-Methylpiperidine-2-carboxylic acid74892-81-248 % similar (S)-Piperazine-2-carboxylic acid147650-70-248 % similar (R)-Piperazine-2-carboxylic acid31321-68-348 % similar Azetidine-2-carboxylic acid2133-34-848 % similar (±)-2-Azetidinecarboxylic acid2517-04-648 % similar D-Azetidine-2-carboxylic acid7729-30-848 % similar