Phytochemical and pharmacological investigation of flowers of hibiscus rosasinensis linn
The flowers of Hibiscus rosasinensis Linn. were extracted with three solvents. The extracts were dried and studied for their hypotensive activity. Among the crude extracts, hydroalcoholic extract was found to show most significant activity with reference to the standard minoxidil. Four new phytoconstituents were isolated from hydroalcoholic extract when a study was made to isolate the active constituents responsible for the exhibited activity. The structures of these constituents were assigned on the basis of their IR, NMR and mass spectral data.