Muscle relaxant activity and hypotensive activity of some Tabernaemontana alkaloids

Stemmadenine, the major alkaloid from the seeds of Tabernaemontana dichotoma, showed hypotensive activity and weak muscle relaxant activity. Perivine, vobasine, coronaridine and dichomine, some of the alkaloids found in the leaves, fruits and bark of T. dichotoma, also showed hypotensive and muscle relaxant activity.