Origin and Production. Xanthoxylum Aubertia, DC. (Fagara Aubertia, DC, Evodia Aubertia, Cordem.) is known in Reunion as Catafaille blanc. It is highly esteemed for wounds and is also used as diaphoretic and blood purifier.
Two samples of oil have been examined thus far but it is not known from what part of. the plant they were distilled. According to Schimmel & Co.3), it has the following properties: d16o 0,9052 to 0,9708; aD - 19°20' to - 62°10'; A. V. 1,1 to 1,3; E. V. 7,3 to 8,7; E. V. after acetylation 33 to 51. In one instance the oil was not completely soluble in 90 p. c. alcohol. Even with 10 vol. only a decidedly turbid solution was obtained. In 95 p. c. alcohol the oil was at first soluble to a clear solution, but upon the addition of more than 2 vol. opalescence was produced due to the separation of paraffin. The second oil formed a clear solution with 90 p. c. alcohol in all proportions. In extreme dilution, however (1:10), slight opalescence was observed. With 10 vol. of 80 p. c. alcohol it did not form a clear solution.
Composition. F. W. Semmler and E. Schossberger4) found in the oil an aliphatic terpene related to ocimene or allo-ocimene. It possessed the following properties: d20o0,8248; aD + 30°; nD 1,49775. The higher boiling fractions contained an unknown, monocyclic sesquiterpene which they named evodene (b. p. 119 to 123° under 9 mm. pressure; d20o0,8781; aD - 58°; nD 1,49900). In addition Semmler and Schossberger proved the presence of 40 to 60 p. c. of methyl eugenol which was characterized by its oxidation product, veratric acid (m. p. 180 to 181°). The highest fractions contained phloracetophenone dimethyl ether, the same substance found in the oil of Xanthoxylum alatum1).
1) See vol. I, p. 422.
2) See Japanese pepper oil, p. 626.
3) Report of Schimmel & Co. April 1907, 105.
4) Berl. Berichte 44 (1911), 2885.