methanol
benzyl chloroformate
(3S,4S)-3,4-Dihydroxy-pyrrolidine-2-carboxylic acid
(R)-4-hydroxy-L-proline ethyl ester
(2S)-2,5-dihydro-1H-pyrrole-1,2-dicarboxylic acid 2-methyl 1-(phenylmethyl) ester
(3aR,4R,6aS)-2,2-Dimethyl-4-(toluene-4-sulfonyloxymethyl)-tetrahydro-[1,3]dioxolo[4,5-c]pyrrole-5-carboxylic acid benzyl ester
(3aR,4S,6aS)-4-((S)-3-Amino-3-carboxy-propylsulfanylmethyl)-2,2-dimethyl-tetrahydro-[1,3]dioxolo[4,5-c]pyrrole-5-carboxylic acid benzyl ester
(3aR,4S,6aS)-2,2-Dimethyl-4-methylsulfanylmethyl-tetrahydro-[1,3]dioxolo[4,5-c]pyrrole-5-carboxylic acid benzyl ester
(2R,3R,4S)-1-benzyloxycarbonyl-2-hydroxymethylpyrrolidine-3,4-diol
(2R,3R,4S)-1-(benzyloxycarbonyl)-2-(hydroxymethyl)pyrrolidine-3,4-diol 3,4-O-isopropylidene acetal