Boc-(R)-g-(4-cyanobenzyl)-L-proline

()-trans-4-(2-Naphthyl)pyrrolidine-3-carboxylic acid hydrochloride

Boc-()-trans-4-(2-trifluoromethylphenyl)pyrrolidine-3-carboxylic acid

Boc-()-trans-4-(6-methoxy-3-pyridinyl)pyrrolidine-3-carboxylic acid

Boc-()-trans-4-(3-thienyl)pyrrolidine-3-carboxylic acid

Boc-()-trans-4-(2-furanyl)pyrrolidine-3-carboxylic acid

2-(4-Boc-piperazinyl)-2-(4-cyanophenyl)acetic acid

Na-Boc-Ng-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-L-2,4-diaminobutyric acid

N-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-L-alaninol

Na-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-D-valinol