A new ajmaline-type alkaloid, 21-Ο-methylisoajmaline (1), together with twenty-one known compounds, a mixture of β-sitosterol (2) and stigmasterol (3), reserpinine (4); tetrahydroalstonine (5), reserpine (6), venoterpine (7), yohimbine (8), 6'-O-(3,4,5-trimethoxybenzoyl)glomeratose A (9),