A new synthetic strategy toward puupehenone-related bioactive metabolites from sclareol oxide, based on a Diels-Alder cycloaddition approach, is described. Utilizing this, marine ent-chromazonarol and the potent angiogenesis inhibitor 8-epipuupehedione have been synthesized.
The letter to the editor presents methodological issues about the search strategy, adequate reporting of meta-analysis, and statistical details of the referred article.
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