Atividade antioxidante de Piper arboreum, Piper dilatatum e Piper divaricatum

Antimicrobial activity of Piper arboreum and Piper tuberculatum (Piperaceae) against opportunistic yeasts

Alkaloids from Piper nigrum and Piper betle

An investigation, on the roots of Piper nigrum and the aerial parts of Piper betle, has yielded several alkaloids. The dried root sample of Piper nigrum was extracted using various solvents in increasing polarity. The dried aerial part of Piper betle was extracted using the Soxhlet extraction method. The alkaloids isolated were pellitorine(1), (E)-1-[3’,4’(Methylenedioxy)cinnamoyl]piperidine(2)...

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Isobutylamides from Piper Ridleyi

-Extract ion of the stems and leaves of Piper ridleyi with ether afforded N-isobutyl-15-(3',4'-methylenedioxyphenyl)-2E,4E,12E-pentadecatrienamide (ridleyamide), as well as the known amide, retrofractamide, and sterols. I N T R O D U C T I O N A variety of unsaturated isobutylamides have been isolated from plant sources, in particular from members of the genus Piper [1]. These compounds are of ...

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