The composition of the alkaloids in plants of the genus Aconitum -A. kirinense, A. altaicum, A. coreanum, and A. nemorosum - has been studied. Four new alkaloids of composition C26H41O8N·HNO3, C35H41O10N·HBr, C20H25O3N, and C23H29O6N have been isolated. © 1966 The Faraday Press, Inc.