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Altamisin, a new sesquiterpene lactone from ambrosia cumanensis H.B.K.

✍ Scribed by J. Borges; M.T. Manresa; J.L. Martín; C. Pascual; P. Vázquez

Publisher
Elsevier Science
Year
1978
Tongue
French
Weight
106 KB
Volume
19
Category
Article
ISSN
0040-4039

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✦ Synopsis

In this communication we report the isolation and structure determination of altamisin (I), a new sesquiterpene lactone whose structure 1 is related to that of the psilostachyins . Chloroform extraction of the 2 aerial part of Ambrosia cumanensis H.B.K. , collected from the outskirts of San Salvador (Central America) and known locally as Altamisa, gave,

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A new sesquiterpene lactone, named potamopholide, was isolated along with the known triterpene lupeol from the leaves of Vernonia potamophila. The stereochemical structure of the new compound, (3R\*,4S\*,5E,8S\*,10S\*)-3,8epoxy-3,4,13-trihydroxy-1-oxogermacra-5,7(11)-dien-6,12olide, was elucidated b