Constituents of Essential Oil from Machilus thunbergii Sieb. et Zucc. Fruit (Part II)

Abstract

A previous paper reported on constituents of the essential oil (I) from fruits of M. thunbergii Sieb. et Zucc. (Japanese name “Tabunoki”) grown in Ibaraki-city (Osaka prefecture). This paper reports on constituents of the essential oil (II) from fruits of Tabunoki grown in Yawata-city (Kyoto prefecture). Oil (I) has a characteristic ocimene-like odor, while oil (II) has a camphor-like odor. The constituents of these two essential oils from the mesocarps, seeds and leaves were investigated by chromatographical and spectral methods. A total of 85 compounds were identified, and among them 17 compounds could not be found in (I). The major components in mesocarp oil were α-pinene (29.0%), camphene (14.0%), limonene (9.0%), 1, 8-cineol (7.5%) and bornyl acetate (7.7%). trans-β-Ocimene, the principal component in (I), was very little in this oil. Further, the seed oil contained β-bisabolene (11.2%), α-curucumene (12. 4%), hexadecanal (16.3%) and a small amount of caryophyllene which was the major component in (I). The leaf oil contained α-pinene (10.8%), caryophyllene (9.0%) and β-bisabolene (25.0%).