(2S,3S,4R,SR)-4-(1-hydroxyethyl)-2-(4-methoxyphenyl)-1-(toluene-4-sulfinyl)-pyrrolidine-3-carboxylic acid diphenylamide

(3aS,6aR)-1-oxo-tetrahydrofuro[3,4-c]pyrrole-5-carboxylic acid methyl ester

(3S,4S)-3-hydroxymethyl-4-isopropenylpyrrolidine-1-carboxylic acid methyl ester

(1R,3aR,6aS)-1-acetoxy-3-oxo-tetrahydrofuro[3,4-c]pyrrole-5-carboxylic acid methyl ester

(3S,4S)-3-hydroxymethyl-4-isopropenylpyrrolidine-1-carboxylic acid tert-butyl ester