Journal
PLANTA MEDICA
Volume 70, Issue 9, Pages 856-860Publisher
GEORG THIEME VERLAG KG
DOI: 10.1055/s-2004-827235
Keywords
Dictyota pfaffii; Dictyotales; dolabellanes; marine diterpenoids; antiviral activity; HSV-1; HIV-1
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Specimens of Dictyota pfaffii from Atol das Rocas, Northeast Brazil, afforded the rare dolabellane diterpene 10,18-diacetoxy-8-hydroxy-2, 6-dolabelladiene (1) and the new 10-acetoxy-8,18-dihydroxy-2,6-dolabelladiene (2). Reduction of 1 yielded 8,10,18-trihydroxy-2,6-dolabelladiene (3), also present in the crude extract of D. pfaffli. All three structures were assigned by 1D and 2D NMR spectral data. These substances showed strong anti-HSV-1 activity in vitro but only 3 inhibited the reverse transcriptase enzyme of HIV-1.
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