1. Gentianine and the three new alkaloids gentiananine, gentianadine, and gentianamine have been isolated from Gentiana turkestanorum and G. olivieri; gentianadine is identical with synthetic 4-(2′-hydroxyethyl) nicotinic lactone. 2. Gentianamine has the structure 5-vinyl-4-(1′-hydroxymethyl-2′-hydroxyethyl) nicotinic lactone. 3. Dihydrogentianine has been converted into dihydrogentianamine. © 1968 The Faraday Press, Inc.