(2S,4S)-1-[(2S)-3-Benzoylsulfanyl-2-methylpropanoyl]-4-phenylsulfanyl pyrrolidine-2-carboxylic acid calcium salt ; CAS # 81938-43-4 ;

Zofenoprilat Sodium ; (4S)-1-[(2S)-3-Mercapto-2-methyl-1-oxopropyl]-4-(phenylthio)-L-proline sodium salt ; CAS # 1329569-13-2 (sodium salt) ; 75176-37-3 (base) ;

Zofenoprilat NES Adduct ; (2S, 4S)-1-((S)-3-(1-Ethyl-2,5-dioxopyrrolidin-3-ylthio)-2-methylpropanoyl)-4-(phenylthio)pyrrolidine-2-carboxylic acid ; CAS # 1217526-22-1 ;