Chemical screening of some Kenyan polygonum species

Abstract

Eleven species of the genus polygonum (family: Polygonaceae) are found in Kenya. They appear in the "key to species" in,the following order: P.baldschuriacum Regel, P.convolvulus L, P.nepalense Meisn, P.capitatum Han, P.afromantanum Greenway, P.aviculare L, P.strigosum R.Br., P.salicifolium wild, P.senegalense Meisn, P,pulchrum Blume and P.setosulum A. Rich. Chemical screening by a process of sequential non-polar and polar solvent extraction (petroleum ether, chloroform and methanol along with acid hydrolysis), chromatographic separation followed by spectroscopic (lH and l3C NMR, UV,. IR and MS) analysis was performed on the latter four species.....