Three novel sesquiterpene peroxides, hanalpinol peroxide (I), isohanalpinol (II), and aoku-manol (III), a new secoguaiane-type sesquiterpene, epialpinolide (IV), and a new elemophilane-type sesquiterpene, Δ11(12)-eremophilen-10β-ol (V), have been isolated from the rhizomes of Alpinia intermedia togethers with eight known sesquiterpenes, hanalpinol (VI), hanalpinone (VII), isohanalpinone (VIII), alpinenone (IX), furopelargone B (X), furopelargone A (XI), intermedeol (XII) and β-selinene (XIII). The structures of I—V were determined by spectroscopic methods, chemical conversion, and X-ray analysis. Their biosynthetic relationships are discussed. From the point of view of chemotaxonomy, it is suggested that Alpinia intermedia and Alpinia japonica are closely related plants. © 1987, The Pharmaceutical Society of Japan. All rights reserved.
CITATION STYLE
Itokawa, H., Morita, H., Kobayashi, T., Watanabe, K., & Iitaka, Y. (1987). Novel Sesquiterpenes from Alpinia intermedia Gagaep. Chemical and Pharmaceutical Bulletin, 35(7), 2860–2868. https://doi.org/10.1248/cpb.35.2860
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