Four meroterpenoids (3a, 3b, 4 and 5), a prenylated pyran-2-one (2) along with the known compounds 7-O-geranylscopoletin (1), and thapsitranstagin (6) have been isolated from the roots of Thapsia transtagana. The presence of 1 and 2 supports the biogenetic hypothesis that transtaganolides, a group of bioactive metabolites, are meroterpenoids which come from an O-prenylated coumarin via successive pericyclic reactions.
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| http://dx.doi.org/10.1016/j.phytochem.2007.06.023 | DOI Listing |
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