515-17-3Relevant articles and documents
NEUE SESQUITERPENLACTONE AUS ASTER UMBELLATUS
Bohlmann, Ferdinand,Dutta, Lakshmi N.,Knauf, Werner,Robinson, Harold,King, Robert M.
, p. 433 - 436 (1980)
The investigation of Aster umbellatus afforded six new eudesmanolides and a new selina-triene and from Aster exilis a new tremetone derivative was isolated.The structures were elucidated by spectroscopic methods and by some chemical transformations.The chemotaxonomic situation is discussed briefly.Key Word Index - Aster umbellatus; A. exilis; Compositae; sesquiterpene lactones; new eudesmanolides; new selinene derivative; new tremetone derivative.
Structures and spasmolytic activities of derivatives from sesquiterpenes of Alpinia speciosa and Alpinia japonica
Morita, Makoto,Nakanishi, Hiroshi,Morita, Hiroshi,Mihashi, Susumu,Itokawa, Hideji
, p. 1603 - 1606 (2007/10/03)
Sesquiterpenes isolated from Alpinia speciosa and Alpinia japonica, and their derivatives were found to inhibit histamine- or barium chloride- induced contraction of excised guinea pig ileum when tested by the Magnus method. Major spasmolytic principles contained in those extracts were the sesquiterpenes, β-eudesmol, nerolidol, humulene epoxide II and 4α- hydroxydihydroagarofuran. Relationships between the chemical structures of the sesquiterpenes and their derivatives, and their spasmolytic activities were discussed.