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(R)-(+)-N-Boc-2-piperidinecarboxylic acid28697-17-850 % similar N-Methyl-D-pipecolic acid41447-17-050 % similar N-Boc-2-piperidinecarboxylic acid98303-20-950 % similar Benzyloxycarbonyl-L-proline1148-11-449 % similar N-(Benzyloxycarbonyl)-D-proline6404-31-549 % similar 1-Methylpiperidine-2-carboxylic acid hydrochloride25271-35-646 % similar (αS)-α-Ethyl-2-oxo-1-pyrrolidineacetic acid102849-49-045 % similar Levetiracetam acid103833-72-345 % similar 1-Cbz-2-piperidinecarboxylic acid28697-07-645 % similar (D)-N-(Benzyloxycarbonyl)pipecolic acid28697-09-845 % similar 1-Carbobenzoxy-2-piperidinecarboxylic Acid71170-88-245 % similar 1-[(tert-Butoxy)carbonyl]azetidine-2-carboxylic acid159749-28-743 % similar Boc-D-azetidine-2-carboxylic acid228857-58-743 % similar 1-Boc-L-azetidine-2-carboxylic acid51077-14-643 % similar (2R)-1-((9H-Fluoren-9-ylmethoxy)carbonyl)pyrrolidine-2-carboxylic acid101555-62-842 % similar Fmoc-pro-OH71989-31-642 % similar Acetyl tetrapeptide-11928006-88-642 % similar N-Benzyl-L-proline31795-93-442 % similar Enalaprilat76420-72-942 % similar (S)-Tetrahydropyridazine-1,2,3-tricarboxylic acid 1,2-di-tert-butyl ester156699-39-741 % similar