Longiflorol, a bergenin α-d-apioside from the stem bark of Diospyros longiflora, and its antioxidant activity

Autor:	Jean de dieu Dongmo, Philippe Belle Ebanda Kedi, Juliette Catherine Vardamides, Anatole Guy Blaise Azebaze, Michel Feussi Tala, Carine Mvot Akak, Hartmut Laatsch
Rok vydání:	2018
Předmět:	Stem bark Antioxidant biology Traditional medicine 010405 organic chemistry medicine.medical_treatment Bergenin General Chemistry Diospyros biology.organism_classification 01 natural sciences 0104 chemical sciences 010404 medicinal & biomolecular chemistry chemistry.chemical_compound chemistry medicine Ebenaceae
Zdroj:	Zeitschrift für Naturforschung B. 73:539-543
ISSN:	1865-7117 0932-0776
Popis:	Phytochemical investigation of the stem bark of Diospyros longiflora yielded longiflorol (1), a new bergenin α-d-apioside, together with bergenin (2) and five known compounds: lupeol (S1), betulin (S2), betulinic acid (S3), stigmasterol (S4) and stigmasterol glucoside (S5). Their structures were determined by one-dimensional (1D) and 2D nuclear magnetic resonance experiments along with electrospray ionization high-resolution mass spectrometry and extended density-functional theory calculations of chiroptical properties. Longiflorol (1) and bergenin (2) were evaluated for their DPPH (2,2-diphenyl-1-picrylhydrazyl) antioxidant activity, with the crude extract for comparison and ascorbic acid as standard. The results showed that the extract and 2 had good antioxidant activity, whereas 1 showed only moderate activity at high concentration (>2 mg mL−1).
Databáze:	OpenAIRE
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