Ott, SC, K.  Jenett-Siems, HH  Pertz, K.  Siems, L.  Witte, and E.  Eich. 2006. ?Bonabiline A, A Monoterpenoid 3-Alpha-Acyloxytropane From The Roots Of Bonamia Spectabilis Showing M3 Receptor Antagonist Activity?. Planta Medica 72. Planta Medica: 1403-1406.