(4S)-N-((S)-3-Mercapto-2-methylpropionyl)-4-(phenylthio)-L-proline benzoate (ester), calcium salt 81938-43-4 L-Proline, 1-(3-(benzoylthio)-2-methyl-1-oxopropyl)-4-(phenylthio)-, calcium salt, (1(R*),2alpha,4alpha)- ZOFENOPRIL CALCIUM Zofenopril calcium [USAN] Zoprace