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6 rezultatima
Metabolism of (-)-grandisin from Piper solmsianum in Coleoptera and Lepidoptera species.
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Prijava Registriraj se
The biotransformation of the major Piper solmsianum leaf phenylpropanoids, such as the tetrahydrofuran lignan grandisin and derivatives was investigated in the beetle Naupactus bipes as well as in the caterpillars Heraclides hectorides and Quadrus u-lucida. Analysis of fecal material indicated that
Larvicidal activity of grandisin against Aedes aegypti.
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Prijava Registriraj se
Dengue is a tropical disease caused by an arbovirus transmitted by the mosquito Aedes aegypti. Because no effective vaccine is available for the disease, the strategy for its prevention has focused on vector control by the use of natural insecticides. The aim of this study was to evaluate the
Cytotoxicity and antiangiogenic activity of grandisin.
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OBJECTIVE
The antitumoural properties of grandisin, a tetrahydrofuran neolignan from Piper solmsianum, were investigated by in-vitro and in-vivo assays using the Ehrlich ascites tumoural (EAT) model.
METHODS
Viability of the tumour cells was evaluated by Trypan blue exclusion and MTT methods, after
Secondary metabolites from the phloem of Piper solmsianum (Piperaceae) in the honeydew of Edessa meditabunda.
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BACKGROUND
The phytochemistry of species of the genus Piper has been studied extensively, including Piper solmsianum. However, no studies have addressed the phytochemistry of the sap content of Piper species.
OBJECTIVE
To evaluate the transferring of secondary compounds from the saps of P.
Trypanocidal tetrahydrofuran lignans from inflorescences of Piper solmsianum.
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Prijava Registriraj se
In addition to sitosterol, syringaldehyde, 3,4,5-trimethoxybenzoic acid, isoelemicin and grandisin, two new tetrahydrofuran lignans were isolated from Piper solmsianun and characterized as rel-(7R,8R,7'R,8'R)-3',4'-methylenedioxy-3,4,5,5'-tetramethoxy-7,7'-epoxylignan and
Phenylpropanoids and tetrahydrofuran lignans from Piper solmsianum.
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Prijava Registriraj se
A tetrahydrofuran lignan as well as the known tetrahydrofuran lignan, (-)-grandisin, and five phenylpropanoid derivatives were isolated from Piper solmsianum. Their structures were determined by means of spectral analyses, including 2D NMR techniques such as NOE-DIFF and HMBC 3J(C-H).
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