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Compounds with Antifouling Activities from the Roots of Notopterygium franchetii

In antifouling screening, the extract of Notopterygium franchetii de Boiss showed obvious activity. Two new phenylpropanoids (1–2) and five known coumarins (3-7) were isolated from the methanol extract of the roots of this species. The structures of the isolated compounds were determined on the basis of spectroscopic analysis. Compounds 1–2 showed definite antifouling activity against larval settlement of Bugula neritina.