Phytoconstituents isolated from phoenixsylvestris roxb

Five compounds were isolated from the chloroform and butanol extracts of the male flower inflorescence of Phoenix sylvestris Roxb. The structures of isolated compounds were established as cholesterol [1], beta-sitosterol [2], beta-amyrin [3], quercetin [4] and quercitrin [5] by modern spectroscopic techniques. This is the first report of occurrence of these compounds from Phoenix sylvestris

Some biological evaluations on samanea saman

Samanea saman [Jacq.] Merr. Was subjected to bioactivity analysis. The records of these investigations are described in this communication. A battery of assays was performed on hexane and methanol extracts of Samanea saman leaves, which include antibacterial activity, antifungal activity, brine shrimp bioassay, Lemna bioassay and insecticidal activity. Both the extracts showed moderate antibacterial activity against Pseudomonas aeruginosa where as moderate antifungal activity of hexane extract against Fusarium solani and of methanol extract against Trichophyton longifusus was observed. In brine shrimp bioassay the methanol extract exhibited cytotoxicity with LD[50] value of 757.3672 micro g/ml. In Lemna bioassay the methanol extract in concentration of 1000 micro g/ml significantly inhibited the growth of Lemna. The results of insecticidal activity showed that the hexane extract of Samanea saman exhibited 505 mortality against Rhyzopertha dominica and Tribolium granarium where as methanol extract remained inactive against all the tested insects

Two triterpenes lupanone and lupeol isolated and identified from tamarindus indica linn

Tamarindus indica, a useful medicinal plant was subjected to phytochemical investigation. Two triterpenes [lupanone and lupeol] have been isolated from the leaves of this plant. Their structures were elucidated with the help of physico-chemical methods and spectroscopic techniques. The lupanone and lupeol from this plant are being reported for the first time