N-Methyl-L-proline475-11-6100 % similar N-Methyl-D-pipecolic acid41447-17-089 % similar Ac-dl-pro-oh1074-79-956 % similar N-Acetyl-L-proline68-95-156 % similar 1-(2-Chloroacetyl)-L-proline23500-10-950 % similar L-Alanyl-L-proline13485-59-149 % similar Glycyl-L-proline704-15-449 % similar Captopril62571-86-246 % similar Ethyl 1-methyl-2-piperidinecarboxylate30727-18-545 % similar 1-[(tert-Butoxy)carbonyl]piperidine-2-carboxylic acid118552-55-943 % similar 1-Methylisonipecotic acid hydrochloride71985-80-342 % similar 1-[(2S)-3-(Acetylthio)-2-methyl-1-oxopropyl]-L-proline64838-55-741 % similar Ucb-L 057102849-49-041 % similar Levetiracetam acid103833-72-341 % similar (-)-Nicotine hydrogen (+)-tartrate2624-48-841 % similar (-)-Nicotine hydrogen (+)-tartrate65-31-641 % similar trans-1,2-Cyclopentanedicarboxylic acid1461-97-840 % similar 1,2-Cyclohexanedicarboxylic acid1687-30-540 % similar (±)-trans-1,2-Cyclohexanedicarboxylic acid2305-32-040 % similar Cyclopentanecarboxylic acid3400-45-140 % similar