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1-(1,1-Dimethylethyl) 3-methyl (3R)-1,3-piperazinedicarboxylate438631-77-746 % similar (2S,4S)-N-Boc-4-methylpyrrolidine-2-carboxylic acid364750-81-246 % similar 1,2-Bis(1,1-dimethylethyl) (2S)-4-oxo-1,2-pyrrolidinedicarboxylate166410-05-546 % similar N-Boc-cis-4-hydroxy-D-proline135042-12-545 % similar 1-(1,1-Dimethylethyl) (2S,4R)-4-hydroxy-1,2-pyrrolidinedicarboxylate13726-69-745 % similar (2R,4S)-N-Alpha-T-butoxycarbonyl-4-hydroxypyrrolidine-2-carboxylic acid147266-92-045 % similar N-Boc-cis-4-hydroxy-L-proline87691-27-845 % similar 1-(1,1-Dimethylethyl) (2S,4S)-4-(methoxymethyl)-1,2-pyrrolidinedicarboxylate1378388-16-944 % similar (1S,4S)-2-Boc-2,5-diazabicyclo[2.2.1]heptane113451-59-542 % similar tert-Butyl 2,5-diazabicyclo[2.2.1]heptane-2-carboxylate hydrochloride134003-84-242 % similar 1,1-Dimethylethyl 5-oxo-2-azabicyclo[2.2.1]heptane-2-carboxylate198835-06-242 % similar 2,5-Diaza-bicyclo[2.2.1]heptane-2-carboxylic acid tert-butyl ester198989-07-042 % similar tert-Butyl 3-((methoxycarbonyl)methyl) azetidine-1-carboxylate497160-14-242 % similar tert-Butyl 3-formylazetidine-1-carboxylate177947-96-540 % similar tert-Butyl 3-methoxyazetidine-1-carboxylate429669-07-840 % similar tert-Butyl 4-(2-methoxy-2-oxoethyl)piperidine-1-carboxylate175213-46-440 % similar 1,1-Dimethylethyl (2S,4R)-4-hydroxy-2-(hydroxymethyl)-1-pyrrolidinecarboxylate61478-26-040 % similar 1,1-Dimethylethyl (2R)-2-(((2,5-dioxo-1-pyrrolidinyl)oxy)carbonyl)-1-pyrrolidinecarboxylate102185-34-240 % similar 1-[(tert-Butoxy)carbonyl]azetidine-2-carboxylic acid159749-28-740 % similar Boc-D-azetidine-2-carboxylic acid228857-58-740 % similar