The total alkaloids of the roots of Convolvulus subhirsutus collected in the period of vigorous growth close to the village of Dzhilga, Chimkent province, have been studied. From the phenolic fraction of the total alkaloids of this species of plant we have isolated phyllalbine and convolidine for the first time. From the nonphenolic fraction of the combined bases we isolated convolvine, which has been found previously, the new alkaloid confoline, and an unidentified base (III). On the basis of spectral characteristics and some spectral transformations it has been established that confoline has the structure of (+)-N-formylconvolvine. © 1981 Plenum Publishing Corporation.