3-Thiomorpholinecarboxylic acid20960-92-3100 % similar L-Thioproline34592-47-766 % similar 4-Thiazolidinecarboxylic acid444-27-966 % similar Azetidine-2-carboxylic acid2133-34-855 % similar (±)-2-Azetidinecarboxylic acid2517-04-655 % similar Proline147-85-352 % similar D-Proline344-25-252 % similar Dl-proline609-36-952 % similar (S)-Piperazine-2-carboxylic acid147650-70-250 % similar (+)-Pipecolic acid1723-00-850 % similar Pipecolic acid3105-95-150 % similar Pipecolic acid4043-87-250 % similar Pipecolic acid535-75-150 % similar Edds20846-91-748 % similar (S)-Morpholine-3-carboxylic acid106825-79-047 % similar (R)-2-Piperazinecarboxylic acid dihydrochloride126330-90-346 % similar 2-Aminothiazoline-4-carboxylic acid2150-55-242 % similar cis-4-Hydroxy-D-proline2584-71-641 % similar Hydroxyproline51-35-441 % similar cis-4-Hydroxy-L-proline618-27-941 % similar