Physalis peruviana L. is widely used in folk medicines to manage diabetes. This study aimed to identify new chemical constituents and explore in vitro antioxidant ability and alpha-glucosidase inhibition activity to explain its antidiabetic mechanism. Methanolic extracts and hexane fractions were prepared and analyzed by CG-FID and GC-MS. In vitro antidiabetic activity was assessed on α-glucosidase inhibition and DPPH models. The phytochemical analysis detected 29 constituents, manly heptacosane (25) and hexadecanoic acid methyl ester (14). Aliphatic hydrocarbons and esters were identified as the main classes of secondary metabolites. Compared to the standard, the methanol-water fraction was the most potent fraction on α-glucosidase inhibition (IC50 32.5 ± 0.27 µg/mL). The antioxidant values (IC50) of two fractions, and the reference were quite close (44.5 ± 0.54; 49.5 ± 0.87; 44.2 ± 0.77 µg/mL). Almost 82.75% are recognized for the first time in the leaf hexane fractions of this plant. The observed antioxidant activity was found to be significantly notable. پرونده مقاله

This study aimed for investigating chemical constituents and biological activities of Diospyros zenkeri (Gürke) F. White. 14 known secondary metabolites have been isolated from the leaves and the twigs of D. zenkeri such as 3-methoxy-7-methyljuglone (1), β-carotene (2), lupeol (3), mixture of β-sitosterol (4) and stigmasterol (5), betulin (6), ursolic acid (7), messagenin (8), 3β,28,30-lup-20(29)-ene triol (9), mixture of the glucosides of stigmasterol (10) and β-sitosterol (11), norbergenin (12), betulinic acid (13) and vanillic acid (14), respectively . The structures of the compounds were elucidated with the help of NMR and mass spectral studies. The compounds 8, 9 and 14 are reported for the first time from the genus Diospyros. The biological screening of all the isolates and the crude methanolic extracts have been carried out including antiproliferative activity, antioxidant potential and inhibitory activity against the enzymes lipoxygenase and urease, respectively. Compound 1 exhibited significant antiproliferative activity against two cancer cell lines CAL-27 (IC50=2.98 μM) and NCI-H460 (IC50=5.57 μM). Methanolic extracts of the leaves and twigs of D. zenkeri presented low antiproliferative activity against these two cancer cell lines. Compounds 1, 6, 8, 9, 12 and the crude extracts exhibited moderate antioxidant activity with IC50 values of 76.5 μM, 65.8 μM, 55.3 μM and 51.2 μM respectively compared to BHA (IC50=44.2 μM). Compounds 6, 8 and 9 showed moderate lipoxygenase inhibition activity with IC50 values of 58.5 μM, 52.8 μM and 58.8 μM, respectively compared to baicalein (IC50=22.6 μM). پرونده مقاله