A new lupin alkaloid, (+)-11-oxocytisine (1), was isolated from the leaves of Sophora secundiflora together with (-)-anagyrine, (-)-N-methylcytisine, (-)-baptifoline, (-)-N-formylcytisine, (-)-N-acetylcytisine and (-)-cytisine. The structure of the new alkaloid (1) was presumed to be (+)-11--oxocytisine on the basis of its spectroscopic data. © 1986.