The molecule is a monocarboxylic acid anion that is the conjugate base of zofenoprilat, obtained by deprotonation of the carboxy group. It is a conjugate base of a zofenoprilat.
(2S,4S)-1-[(2S)-2-methyl-3-sulfanylpropanoyl]-4-phenylsulfanylpyrrolidine-2-carboxylate