A study of the extractives of the three species of the genus Ptelea (Rutaceae) has yielded typically rutaceous coumarins and furoquinoline alkaloids. The fruit of P. aptera contains small amounts of a new furoquinoline alkaloid shown to be 7-isopentenyloxy-γ-fagarine (III). A further new alkaloid, identified as 3-isopentenyl-4-methoxy-7,8-methylenedioxy-2-quinolone (II), has been obtained from the extracts of one sample of P. trifoliata L. © 1969.