Biyoulactones A-C, new pentacyclic meroterpenoids from Hypericum chinense.


Three novel pentacyclic meroterpenoids with a unique dilactone structure containing C-C bonded bi- and tricyclic γ-lactone moieties, biyoulactones A-C (1-3), were isolated from the roots of Hypericum chinense, and their structures were elucidated on the basis of spectroscopic data. The relative and absolute stereochemistry of 1 was assigned by a combination… (More)
DOI: 10.1021/ol2021548


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