According to M. Leprince3) the bark of Xanthoxylum ochroxylum, DC. (family Rutaceae), known in Venezuela as Bosuga blanca, yields, when extracted with petroleum ether, 6 p.c. of an oil with a density of 0,945 at 15°. Its taste is pungent and astringent, the odor is fresh. At ordinary pressure the oil cannot be distilled and it is saponifiable only in small part. Presumably it is a mixture of fatty and volatile oils.