The mixture of eugenol and zinc oxide resulted in a lignin-like polymer; this was verified by spectroscopy. 14C-eugenol with high specific activity was synthesized and administered intraperitoneally to rats. 14C-eugenol was subsequently found in all tissues. Chromatography was used for separation and quantitation of this compound.

Methylation under pressure of o‐allyloxyphenol with 14C‐metheyl iodide was successfully used for the synthesis of 14C‐eugenol and isoeugenol labeled in the methoxy position. Eugenol and isoeugenol are important compounds in the practice of dentistry.