Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Article, Archiv der Pharmazie (Weinheim, Germany) called A novel dipeptide-based HIV protease inhibitor containing allophenylnorstatine, Author is Abdel-Rahman, Hamdy M.; El-Koussi, Nawal A.; Alkaramany, Gamal S.; Youssef, Adel F.; Kiso, Yoshiaki, which mentions a compound: 117918-23-7, SMILESS is O=C([C@H]1N(C(OC(C)(C)C)=O)CSC1(C)C)O, Molecular C11H19NO4S, Name: (R)-3-(tert-Butoxycarbonyl)-5,5-dimethylthiazolidine-4-carboxylic acid.
Dipeptide analogs, such as I and II [P2′ = NHCMe2Ph, NHN(Me)Ph, NH2CH2C6H4-2-OMe, etc.] incorporating allophenylnorstatine [Apns; (2S,3S)-3-amino-2-hydroxy-4-phenylbutyric acid] as a transition state mimic at the scissile bond, were designed and synthesized in the hope of obtaining a novel KNI series of HIV protease inhibitors. Improved activity of most of the members of series II relative to their analogs of series I can be partially attributed to the differences in the structures of the P2 moieties. Positional isomerism in the P2′ moieties significantly affected the activity and polarity of the target.
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Reference:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts