The essential oils of eight samples of Piper aduncum L., collected at dierent localities of the Amazon region, were analysed by GC±MS. The major component identi®ed in all samples was dillapiole (31.5± 97.3%). Sample A, collected at Serra do Navio (AP), showed a yield of oil and dillapiole content o
Antimicrobial Properties of the Constituents of Piper aduncum
✍ Scribed by Adewole L. Okunade; Charles D. Hufford; Alice M. Clark; David Lentz
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 84 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0951-418X
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✦ Synopsis
An ethanol extract of the leaves of Piper aduncum demonstrated good antimicrobial activity. Bioassay-directed fractionation of this extract led to the isolation of 4-methoxy-3,5-bis(3Ј-methylbenzoic acid) 1, 2,6-dihydroxy-4-methoxy-chalcone 2, nervogenic acid 3 and 2,2-dimethoxy-8-(3-methyl-2-butenyl)-2H-chromene-6-carboxylic acid 4. These compounds showed considerable in vitro antifungal and antibacterial activity.
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## Abstract The chemical compositions of the essential oils from the leaves of __Piper aduncum__ from Panama and Bolivia were investigated by GC‐FID, GC‐MS and ^13^C‐NMR. In total, 55 components were identified representing 99.3 and 80.3% of each sample, respectively. The oil from Panama was charact
## Abstract A new pyridone alkaloid, 5,6‐dihydro‐5‐hydroxy‐1__H__‐pyridin‐2‐one (**1**), and a new ester, sintenin (=3‐(3,4‐dimethoxyphenyl)propyl 3‐(3,4‐dimethoxyphenyl)propanoate **2**), together with three known compounds, 5,6‐dihydro‐1__H__‐pyridin‐2‐one (**3**), __d__‐sesamin (=5,5′‐(3a,4,6,6a