(2S,4S)-4-Acetylsulfanyl-2-(1-methyl-1H-tetrazol-5-ylsulfanylmethyl)-pyrrolidine-1-carboxylic acid allyl ester

(2S,4S)-2-[1-(2-Hydroxy-ethyl)-1H-tetrazol-5-ylsulfanylmethyl]-4-mercapto-pyrrolidine-1-carboxylic acid allyl ester

(2S,4S)-2-[1-(2-Dimethylamino-ethyl)-1H-tetrazol-5-ylsulfanylmethyl]-4-mercapto-pyrrolidine-1-carboxylic acid allyl ester

(2S,4S)-2-(1-Dimethylcarbamoylmethyl-1H-tetrazol-5-ylsulfanylmethyl)-4-mercapto-pyrrolidine-1-carboxylic acid allyl ester

(2S,4S)-4-Mercapto-2-(1-methylcarbamoylmethyl-1H-tetrazol-5-ylsulfanylmethyl)-pyrrolidine-1-carboxylic acid allyl ester