Alstonia venenata
Alstonia venenata is a plant of the family Apocynaceae. It grows as a shrub or small tree in low to mid elevation deciduous forests of India. The bark of the plant and, sometimes, the fruit, are used for medicinal purposes.
Alkaloids
Stigmasterol, reserpine, and two new indole alkaloids, venenatine and isovenenatine, were isolated from the bark.A pair of alkaloids were discovered in the fruits of this plant called echitovenidine and -minovincinine:
Echitoserpidine is another alkaloid discovered in the fruits of this plant.