Friday, November 09, 2007

New Compounds Isolated from Nepalese Propolis

Chemical Constituents of Nepalese Propolis (II)
Chemical & Pharmaceutical Bulletin, Vol. 55 (2007) , No. 6 926

A novel flavanonol, three new isoflavones and a new flavan-3-ol were isolated along with ten other known flavonoids from the methanolic extract of propolis collected from Chitwan, Nepal. Their structures were determined on the basis of spectral analysis.

…The chemical consistency of propolis is highly dependent on the flora of the region from where it is collected.

As a part of our ongoing study on propolis of different geographical locations of Nepal, previously we have reported three new and nine known flavonoids from propolis of Chitwan. In this paper, we will report on further isolation of new compounds from the remaining fractions and sub fractions of the same propolis…

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