The problem of the 1,2,9,10-tetraoxygenated aporphines and the structure of the quaternary aporphine from Fagara tinguassoiba.
D000470:Alkaloids; D002625:Chemistry, Organic; D055601:Organic Chemistry Phenomena; D010944:Plants / Q000032:analysis; D012492:Salts / Q000032:analysis
D000470:Alkaloids; D012492:Salts