The epigeal part of Sophora alopecuroides has given 2.5% of combined alkaloids, from which sophoridine (0.37%), cytisine (0.16%), N-hydroxyethylcytisine (0.042%), baptifoline (0.0013%), and the new bases (IV) (0.021%) and (VI) (0.0027%) have been isolated; the structure of 3 α-hydroxysophoridine has been proposed for (IV). © 1975, Plenum Publishing Corporation. All rights reserved.