Isolation and characterization of antioxidative monoterpenes from Cynanchum atratum roots
BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY(2022)
Abstract
One novel monoterpene rhamnoside (1) and 7 known monoterpenes (2-8) were isolated from the ethanol extract of Cynanchum atratum for the first time. Their structures were identified by comprehensive spectroscopic data analysis such as nuclear magnetic resonance, high-resolution electrospray ionization mass spectra, optical rotatory dispersion, and acid hydrolysis. In the subsequent antioxidant assay, compound 8 exhibited obvious 2,2-diphenyl-2-picrylhydrazyl hydrate radical scavenging activity.
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Key words
monoterpenes, Cynanchum atratum, DPPH, antioxidative
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