Two alkaloids of a new type - komarovine and komarovidine - have been isolated from the epigeal part of the Nitraria komarovii. Their structures - 3-(quinolin-8'-yl)-β-carboline and 3-(quinolin-8'-yl)-5,6-dihydro-β-carboline, respectively - have been established by synthesis. © 1981 Plenum Publishing Corporation.