8-Methoxyneorautenol and radical scavenging flavonoids from Erythrina abyssinica
Kiremire, Bernard T
Mbugua, Martin N
Gitu, Peter M
Peter, Martin G
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A new pterocarpan (named 8-methoxyneorautenol) was isolated from the acetone extract of the root bark of Erythrina abyssinica. In addition, the known isoflavonoid derivatives eryvarin L, erycristagallin and shinpterocarpin were identified for the first time from the roots of this plant. The structures were determined on the basis of spectroscopic evidence. The new compound showed selective antimicrobial activity against Trichophyton mentagrophytes. The acetone extract of the root bark of E. abyssinica showed radical scavenging activity towards 2,2-diphenyl-1-picrylhydrazyl radical (DPPH). The pterocarpenes, 3-hydroxy-9-methoxy-10-(3,3- dimethylallyl)pterocarpene and erycristagallin, were the most active constituents of the roots of this plant and showing dose-dependent activities similar to that of the standard quercetin.
CitationAbiy Yenesew, Hannington Twinomuhwezi, Bernard T. Kiremire et al (2009). 8-Methoxyneorautenol and radical scavenging flavonoids from Erythrina abyssinica. Bull. Chem. Soc. Ethiop. 23(2), 205-210.
Department of Chemistry, University of NairobiDepartment of Chemistry, Makerere UniversityInstitut für Chemie, Universität Potsdam, Germany