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(R)-Piperazine-2-carboxylic acid31321-68-342 % similar Azetidine-2-carboxylic acid2133-34-841 % similar (±)-2-Azetidinecarboxylic acid2517-04-641 % similar D-Azetidine-2-carboxylic acid7729-30-841 % similar 1,2,3,4-Tetrahydro-3-isoquinolinecarboxylic acid hydrochloride41994-51-840 % similar Proline147-85-339 % similar D-Proline344-25-239 % similar DL-Proline609-36-939 % similar (+)-Pipecolic acid1723-00-838 % similar L-Pipecolic acid3105-95-138 % similar L-Thioproline34592-47-738 % similar DL-Pipecolic acid4043-87-238 % similar 4-Thiazolidinecarboxylic acid444-27-938 % similar DL-Pipecolic acid535-75-138 % similar Isonipecotic acid hydrochloride5984-56-538 % similar (1S,2S)-2-Fluorocyclopropanecarboxylic acid105919-34-437 % similar (1R,2R)-2-Fluorocyclopropanecarboxylic acid127199-13-737 % similar (1S,2S)-2-Fluorocyclopropanecarboxylic acid127199-14-837 % similar trans-2-Fluoro-cyclopropanecarboxylic acid130340-04-437 % similar 2-Fluorocyclopropanecarboxylic acid156816-78-337 % similar