Abstract
In an acidic fraction of the tailings of Japanese peppermint oil, thymol was found by its color reaction and identified as nitrosothymol (mp.=163_??_167°C), thymoquinone (mp.=47_??_48°C), and thymol-phenylurethane (mp.=107_??_108°C). The presence of carvacrol was uncertain.
In fraction III next to thymol fraction, the presence of sesquiterpen-alcohol or -keton was assumed by its color-reaction, physical constants, and a few chemical reactions.
bp.=265°C, d20=0.9849 n20D=1.5040
