title: Alkaloids from Macoubea guianensis seeds.
abstract: From the seeds of Macoubea guianensis (Apocynaceae), mixtures of the antipodes of two indole alkaloids, vincadifformine and vincadine, have been isolated; in the first the (+)- and in the second the (-)-isomer predominated.
mesh_terms: D000470:Alkaloids / Q000302:isolation & purification*; D055598:Chemical Phenomena; D002621:Chemistry; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D010947:Plants, Toxic / Q000032:analysis*; D012639:Seeds / Q000032:analysis; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013237:Stereoisomerism
chemical_list: D000470:Alkaloids