Chemical constituents of Argyreia argentea, Millingtonia hortensis and Pyrostegia venusta

Department of Chemistry, Tripura University, Agartala-799 004, India

School of Pharmaceutical Sciences, Kitasato University, Minato-ku, Tokyo 108 8641, Japan

Manuscript received 10 January 2001, revised 21 May 2001, accepted 6 August 2001

Isolation of five known compounds n-hentriacontanol, β-sitosterol, friedelin, epifriedelinol and epifriedelinol acetate from Argyreia argentea aerial parts; four known compounds nonacosanoic acid, ursolic acid, oleanolic acid and 6-methoxy-5,7,4'- trihydroxyflavone from Millingtonia hortensis flower, and four known compounds lupeol, betulin, betulinic acid and choline chloride from the stem bark of Pyrostegia venusta is reported.