Antioxidant phenolic and quinonemethide triterpenes from Cheiloclinium cognatum

  • Phytochemistry. 2004 Jul;65(13):1977-82. doi: 10.1016/j.phytochem.2004.03.039.
Alex Haroldo Jeller  1 ,  Dulce Helena Siqueira Silva ,  Luciano Morais Lião ,  Vanderlan da Silva Bolzani ,  Maysa Furlan
Affiliations
  • 1. Departamento de Química, Universidade Estadual de Mato Grosso do Sul, CP 351, 79804-970 Dourados, MS, Brazil.
PMID: 15280004 DOI: 10.1016/j.phytochem.2004.03.039
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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