Abstract
The previously estimated carbonyl compoundt1) contained in the caustic alkali soluble-fraction of the essential oil of the Japanese flue cured tobacco leaf was identified as crotonal-dehyde, and the presence of α-pyrrylmethylketone in this phenol fraction was also proved. On the other hand, the constituents and contents of carbonyl and phenolic compounds, contained in this fraction before redrying, were compared with those of after redrying and aging. In the course of redrying and aging stages, phenolic compounds having the carbonyl group and the carbonyl compounds of this fraction increased, but the phenolic compounds having no carbonyl group decreased. Methylsalicylate could not be found in that fraction before redrying, but m-cresol was newly isolated and identified.
