Duguetia eximia Diels (Annonaceae) was collected near Manaus, AM, Brazil. The CHCl3 extract (6g, 0.15%) of its trunk wood was separated by silica gel column chromatography and TLC into 2,4,5-trimethoxystyrene (11 mg), sitosterol (40 mg), O-methylmoschatoline (35 mg, 1a), 11-methoxy-1,2-methylenedioxyoxoaporphine (110 mg, new compound 1b), and 11-hydroxy-1,2-methylenedioxyoxoaporphine (10 mg, new compound 1c). Known compounds were identified by comparing mp, UV, IR, PMR, and MS data with literature reports. New compounds 1b and 1c were characterized as oxoaporphines based on their color, bathochromic UV shifts in acidic solution, carbonyl IR absorption at 1660 cm⁻¹, and spectral/chemical methods (methylation of 1c yielded 1b; successive MeI-methylation and Clemmensen reduction of 1b gave (+)-O-methylpukateine), with 1b designated oxo-O-methylpukateine. Fagara mayu (Bert. ex Hook. et Arn.) Engler (Rutaceae), the most abundant tree in Robinson Crusoe Island's rain forest, has leaves containing 0.1% alkaloids. The alkaloids were separated and identified as skimmianine, (-)-edulinine, and ribalinine. (-)-Edulinine is unlikely to be an artefact. No other member of the Zanthoxylum/Fagara complex contains edulinine or ribalinine, and F. mayu is the only known member of this group to synthesize a linear pyranoquinolone, which has taxonomic significance.