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3-Morpholinecarboxylic acid77873-76-847 % similar (R)-2-Piperazinecarboxylic acid dihydrochloride126330-90-346 % similar (2S)-Piperazine-2-carboxylic acid dihydrochloride158663-69-546 % similar Piperazine-2-carboxylic acid dihydrochloride3022-15-946 % similar (2R,4R)-4-Methylpiperidine-2-carboxylic acid74892-81-246 % similar 2-Aminothiazoline-4-carboxylic acid2150-55-242 % similar cis-4-Hydroxy-D-proline2584-71-641 % similar (2R,4S)-4-Hydroxypyrrolidine-2-carboxylic acid3398-22-941 % similar Hydroxyproline51-35-441 % similar cis-4-Hydroxy-L-proline618-27-941 % similar 1,4-Dithia-7-azaspiro[4.4]nonane-8-carboxylic acid, hydrobromide (1:1), (8S)-75776-79-341 % similar S-2-Hydroxyethyl-L-cysteine6367-98-241 % similar trans-3-Hydroxy-L-proline4298-08-240 % similar DL-Lanthionine3183-08-239 % similar 2-Phenylthiazolidine-4-carboxylic acid42607-21-639 % similar (2R,4S)-4-Fluoropyrrolidine-2-carboxylic acid131176-02-839 % similar (2S,4S)-4-Fluoro-pyrrolidine-2-carboxylic acid2438-57-539 % similar (4R)-4-Fluoro-L-proline2507-61-139 % similar Fudosteine13189-98-538 % similar (2R,4S)-4-Hydroxypyrrolidine-2-carboxylic acid hydrochloride142347-81-738 % similar