Geniconitine,A New Diterpenoid Alkaloid from Roots of Aconitum geniculatum Fletcher

From the roots of Aconitum geniculatum Fletcher, seven diterpenoidalkaloids were isolated, six of which were identified as yunaconitine (1), crassicaulineⅠ(2), vilmorrianine C(3), talatisamine (4), chasmanine (5), and 8-deacetyl-yunaconitu-ne(6), geniconitine, a new diterpenoid alkaloid, was established as (7)by means of MS,IR, 1HNMR, 13CNMR, and chemical methods.