This section is from the book "The Volatile Oils Vol1", by E. Gildemeister. Also available from Amazon: The Volatile Oils.

Thus far methylIsoeugenol has been found only in the oil from Asarum arifolium. Artificially it is obtained by the methy-lation of isoeugenol and by the inversion of methyleugenol. The following properties have been recorded:
B. p. 2630;1) dll.5O 1,064; nDl,5720.2)
It yields a characteristic dibromide, m. p. 101 to 102°, and can be oxidized to veratric acid.
 
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