Part IV.] Simonsen : Conslituents of Indian Essential Oils. 
31 
PART VII. 
The Essential Oil from the Seeds of Zanthoxylum 
Budrunga, Wall. 
It would appear to be very doubtful if the two species Zanthoxylum 
Rhetsa D. C. and Zanthoxylum Budrunga, Wall, are in reality different 
from one another. The distribution of Z. Rhetsa. D. C. (including Z. 
Budrunga, Wall.) is fairly extensive since it is found on the Eastern 
and Western Ghats, in Bihar and Orissa, Bengal, Assam and 
Burma. 
The seeds used in this investigation were obtained from Kanara and 
the plant from which the seeds were derived was definitely identified 
by Mr. R. S. Hole as being Z. Budrunga, Wall. It will be a matter 
for future investigation to determine whether the so-called Z. Rhetsa 
really exists as a separate species and whether a different oil can be 
obtained from the seeds. 
The seeds find a local use as a condiment but so far as the 
authors are aware the oil has not found any commercial 
application. 
Some years ago Semmler (Berichte. 1911. 44. 2885.) examined an oil 
which had been placed at his disposal by Messrs. Schimmel and Co. and 
which was stated to have been distilled from the seeds of Z. alatum. 
From this oil he isolated (1) a terpene to which he gave the name xanth- 
oxylene, although he pointed out that it was in all probability ident- 
ical with i-sabinene, (2) a small quantity of an aldehyde probably 
cuminaldehyde, and (3) a ketone which was identified as dimethoxy 
phloroacetophenone. As was pointed out in part V. of this 
series (page 23), the oil from Z. alatum was found to have 
quite different properties and to consist almost entirely of 
phellandrene. 
The oil obtained by the authors from the seeds of Z. Budrunga would, 
however, appear to resemble in its properties the oil examined by 
Semmler. Two samples of seeds were used, namely, young 
seeds and mature seeds and in Table I are given the constants 
of the oils obtained together with the constants found by Semmler 
for his oil. 
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