Quercetin from n-butanol Soluble Fraction of Crude Ethanol Leaf Extract of Cadaba Farinosa Forssk

Abstract The plant Cadaba farinosa Forssk (Capparaceae) is distributed throughout the world in mostly tropical and sub-tropical regions. It is used in treatment of pains, dysentery, rheumatism, cough, fever, as antidote and neurological disorders. Phytochemical screening of the leaf revealed the presence of alkaloids, anthraquinones, carbohydrates, cardiac glycosides, flavonoids, glycosides, saponins and tannins. Silica gel column chromatography of the n-butanol soluble fraction (NBU) followed by gel filtration using sephadex LH-20 and PTLC led to isolation of a Flavonol aglycone characterised as Quercetin by spectroscopic techniques. The complete 1H and 13C NMR spectral assignments of the isolated compound is reported herewith on the basis of 1D (1H and 13C) and 2D (COSY, NOESY, HSQC, HMBC) NMR.

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Updated: May 8, 2018 — 5:22 am