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Updated: Aug 23, 2026

Semi-Targeted Ultra-High-Performance Chromatography Coupled to Mass Spectrometry Analysis of Phenolic Metabolites in Plasma of Elderly Adults
Published on: April 22, 2022
Antioxidant phenolic and quinonemethide triterpenes from Cheiloclinium cognatum
Alex Haroldo Jeller1, Dulce Helena Siqueira Silva, Luciano Morais Lião
1Departamento de Química, Universidade Estadual de Mato Grosso do Sul, CP 351, 79804-970 Dourados, MS, Brazil.
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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