(?), n. (Chem.) An alkaloid found in several species of lupine (Lupinus luteus, Lupinus albus, etc.), and extracted as a bitter crystalline substance, having a formula C10H19NO. Called also l-lupinine
[1913 Webster]

Chemically it is a a bicyclic saturated quinolizine [1-R-trans]-Octahydro-2H-quinolizine-1-methanol, with the structure:
CH2OH | /\ H /\ / \|/ \ | | | | N | \ / \ / \/ \/


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