From extracts of the leaves and/or the roots of Psychotria correae, isodolichantoside and the new alkaloids correantoside, 10-hydroxycorreantoside, correantines A to C, and 20-epi-correantine B were isolated, in addition to two cerebrosides and some isoprenoids. Structures were established by spectroscopic studies in combination with chemical interconversions and partial synthesis.