doi: 10.1016/j.phytochem.2004.03.039.
Antioxidant phenolic and quinonemethide triterpenes from Cheiloclinium cognatum
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- PMID: 15280004
- DOI: 10.1016/j.phytochem.2004.03.039
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Antioxidant phenolic and quinonemethide triterpenes from Cheiloclinium cognatum
Phytochemistry.
2004 Jul.
Abstract
The triterpenes, 22beta-hydroxypristimerin and cognatine, were isolated together with the known compounds pristimerin, maytenin, 20alpha-hydroxymaytenin, 22beta-hydroxymaytenin, netzahualcoyol, netzahualcoyondiol and netzahualcoyone from root bark of Cheiloclinium cognatum. The structures of the isolated compounds were elucidated by interpretation of their spectral data, including gHMQC and gHMBC experiments. The isolates were investigated for their radical scavenging abilities through a spectrophotometric assay involving reduction of 2,2-diphenyl-picryl hydrazyl (DPPH).
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