Chemical constituents from roots of Pyrostegia venusta and considerations about its medicinal importance. This paper Describes the chemical constituents isolated from roots of Pyrostegia venusta. From ethanol extract of the roots allantoin, b -sitosterol, 3b-O-b-D-glupyranosylsitosterol and hesperedin Were isolated. The structures of These natural products Were identified on the basis of spectral data, including 2D NMR of the peracetyl derivative of hesperidin.
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