Prenylated flavonoids from the roots of Artocarpus heterophyllus / 药学学报

Ten isoprenylated flavonoids were isolated from 95% ethanol extraction of Artocarpus heterophyllus, with a combination of various chromatographic approaches, including ODS, MCI, CHP-20 P, Sephadex LH-20 and high performance liquid chromatography. On the basis of physic-chemical characters and spectroscopic data analysis, these compounds were identified as artoheteroid E (1), cycloheterophyllin (2), artelastoxanthone (3), artoindonesianin Q (4), cudraflavone C (5), 8-(γ,γ-dimethylallyl)-5,2',4'-trihydroxy-7-methoxyflavone (6), kuwanon T (7), 6-(3-methylbut-2-enyl) apigenin (8), 5,7,2',4'-tetrahydroxy-6-(3-methylbut-3-enyl) flavone (9), albanin A (10). Among them, compound 1 is a new one, while compounds 2-4 were isolated for the first time from the plant of Artocarpus heterophyllus. All isolated compounds were screened for their inhibitory abilities against cathepsin K. Of them, compounds 3-5, 7 and 10 showed inhibitory effects with the IC50 values of 0.9, 1.6, 4.5, 24.5 and 63.5 μmol·L-1, respectively.

Phenolic constituents from roots of Artocarpus heterophyllus / 中草药

Objective: To investigate the phenolic constituents from the roots of Artocarpus heterophyllus. Methods: Compounds were isolated from the roots of the plant by column chromatography over ODS, MCI GEL CHP-20P, Sephadex LH-20 and by preparative HPLC. Their structures were identified by the analysis of their physicochemical properties and the spectral data of NMR and MS. Results: Seventeen phenolic compounds were isolated from the roots of the plant, namely 1-O-feruloylglycerol (1), hypargystilbene A (2), oxyresveratrol (3), 2', 3, 4', 5, 5'-pentahydroxy-cis-stilbene (4), resveratrol (5), ethyl 2, 4-dihydroxybenzoate (6), ethyl 3, 4-dihydroxybenzoate (7), umbelliferone (8), 8-(3, 3-dimethylallyl)-6, 7-dihydroxycoumarin (9), morachalcone A (10), artocarpanone (11), styracifolin C (12), cudraflavone C (13), heterophyllin (14), cycloheterophyllin (15), artonin A (16), and artonin B (17). Conclusion: It is the first report of the occurrence of compound 9 as a natural product. Compounds 1, 4, and 6 are isolated from the plants of Moraceae family for the first time. Compound 8 is first obtained from the plants of Artocarpus J. R. et G. Forst., while compounds 3, 5, 10, 11, 14, and 15 are first found in A. heterophyllus.