Extraction et structure cristalline de la physaline B
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4996(2), b = 14. 35620(10), c = 14.
75190(10)Å, V = 2607. 97(5)Å3, Z = 4, Dc = 1.
382mg/cm3, Mr = 542. 56, F(000) = 1152, et μ= 0.
870 mm-1. Le R final = 0,0389 et wR = 0,1037 pour 47670 réflexions observées (I > 2ο(I)).
La molécule rigide est constituée de huit anneaux fusionnés impliquant deux lactones. Il y a deux molécules C28H32O9 dans une unité symétrique, et le composé titre est empilé dans une structure de couche 3D grâce à des liaisons hydrogène.
Dans la plage de 5-20μmol/L, la physaline B peut inhiber de manière significative la sécrétion des cytokines inflammatoires TNF-α et IL-6 sur les cellules RAW264. 7.
Les résultats suggèrent que la physaline B a une activité anti-inflammatoire in vitro. .
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