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Journal Article 
Terpenoids of the wood oil of sugi (Cryptomeria japonica) VIII. Components of KenKunisaki-5 and five other elite clones 
Nagahama, S; Fujii, H; Sonoda, T; Sasaki, M; , 
Mokuzai Gakkaishi
ISSN: 0021-4795 
The ether-soluble fractions of acetone extracts obtained from heartwood of 6 sugi (Cryptomeria japonica D. Don) elite clones, grown in two different next-generation experimental forests were analyzed. It was found that the main components of the same clone alternated between cubebols (16b, 18b) and delta-cadinene (12a) depending on habitat. As these compounds have a common intermediate cation as a precursor, all sesquiterpenoid components were systematized along the route of biosynthesis and seven (I-VII) intermediate cations were selected to compare the component profile of each elite clone with the sequentially synthesized compounds groups. The existence of thujopsene (6) and cedrol (26b) differed among individual trees belonging to the same variety. Thus identification of varieties from sesquiterpenoid components was thought to be difficult, except for samples with a special component profile like the case of Minamatasho 4 described in the previous report. (+)6,7-Dihydroxyferruginol (65c) was found as a new component.Leaves of corresponding clones were collected separately and their hexane extracts were analyzed. Kunisaki 5 contained phyllocladene as the main diterpene characteristic form of Yabukuguri, and the other 5 clones contained mainly kaurene. Each profile of sesquiterpene alcohols was characteristic of the clones.