• Cytisine, a tricyclic quinolizidine alkaloid found in Baptisia, Cytisus, Laburnum , and Sophora species, has nicotinelike effects on the gastrointestinal (GI) tract and the central nervous system (CNS). (medscape.com)
  • Lupinus species contain sparteine, a tetracyclic quinolizidine alkaloid, and lupinine, a bicyclical quinolizidine alkaloid. (medscape.com)