Chemical Structure of Piericidin A

Ozonolysis of Hydropiericidin A diacetate gave an acetylated monohydroxy acid, C₁₇H_32-34 (OCOCH₈)·COOH and its N-methoxycarbonyl amide, C₁₇H_32-34 (OCOCH₃)·CONHCOOCH₃. On the other hand, by ozonolysis of Piericidin A diacetate, an acid C₉H₁₂NO₃·C00H was obtained. On the basis of ultraviolet, infrared and NMR spectra and of chemical evidences, the structure (VI) or (VI′) was presented to this acid. Thus, the structure (VII) or (VII′) was proposed to Piericidin A.