From the roots of Dictamnus angustifolius G. Don. collected in Chimgan at the end-of-fruit-bearing stage have been isolated alkaloids dictamnine, skimmianine, γ-fagarine, isodictamnine, isopteleine, and preskimmianine, the limonoid fraxinellone, and the steroid β-sitosterol. This is the first time that any of these substances, with the exception of dictamnine and skimmianine, have been found in this plant. © 1979 Plenum Publishing Corporation.