Abstract
The essential oils of L, Makinei and L. auratum were examined in detail. From L. Makinei 12 compounds were isolated and confirmed by direct comparison with the authentic samples, and 4 trace components were identified by GLC-MS method. Among them 2, 6, 6-trimethyl-2-vinyl-5-ketotetrahydropyran (2) was newly isolated as natural product. On the other hand, 25 compounds were isorated from L, auratecm and characterized, and 6 trace components were also identified.The essential oil of L. Makinoi. contained cis-2, 6, 6-trimethyl-2-vinyl-5-hydroxytetrahydropyran (1) as the'main component, along with small amount of linalool relatively large amounts of the other oxidation compounds of linalool, and small amounts of a few phenolic compounds. The essential oil of L. auratum, on the contrary, contained linalool, many phenolic compounds in large guantities, and some oxidation compounds of linalool in smail quantities.
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