(2R,4R)-4-hydroxy-1,2-pyrrolidinedicarboxylic acid dimethyl ester

(2S,4R)-N-acetyl-4-benzoyloxy-proline

N-(3,5-dinitrobenzoyl)-(4R)-hydroxy-L-proline

(2S,4R)-N-Methoxycarbonyl-4-<(tert-butyl)dimethylsilyloxy>pyrrolidin-2-carbonsaeure

3-吡咯烷醇