Antioxidant phenolic and quinonemethide triterpenes from Cheiloclinium cognatum |
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Authors: | Jeller Alex Haroldo Silva Dulce Helena Siqueira Lião Luciano Morais Bolzani Vanderlan da Silva Furlan Maysa |
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Affiliation: | Departamento de Química, Universidade Estadual de Mato Grosso do Sul, CP 351, 79804-970 Dourados, MS, Brazil. |
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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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Keywords: | Cheiloclinium cognatum Hippocrateaceae Quinonemethide triterpenes Phenolic triterpene Antioxidant activity |
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