Ac-SDKP
(S)-1-{(S)-2-[(S)-2-((S)-2-Benzyloxycarbonylamino-3-tert-butoxy-propionylamino)-3-tert-butoxycarbonyl-propylamino]-6-tert-butoxycarbonylamino-hexanoyl}-pyrrolidine-2-carboxylic acid tert-butyl ester
Lisinopril
(S)-1-[(S)-2-((S)-2-Benzyloxycarbonylamino-3-tert-butoxycarbonyl-propylamino)-6-tert-butoxycarbonylamino-hexanoyl]-pyrrolidine-2-carboxylic acid tert-butyl ester
(S)-1-[(S)-6-tert-Butoxycarbonylamino-2-((R)-1-ethoxycarbonyl-3-phenyl-propylamino)-hexanoyl]-pyrrolidine-2-carboxylic acid tert-butyl ester