Chemical Constituents from Diaphragma Juglandis Fructus
Objective To investigate the chemical constituents of Diaphragma juglandis Fructus.Methods The compounds were isolated and purified by column chromatography and their structures were elucidated on the basis of physical characteristics and spectral data.Results Twelve compounds were isolated and their structures were identified as juglanin A (1),juglanin D (2),gallic acid (3),progallin A (4),protocatechuic acid (5),quercetin (6),dihydroquercetin (7),catechin (8),quercitrin (9),quercetin-3-O-(6"-galloyl)-β-D-galactopyranoside (10),β-sitosterol (11) and daucosterol (12).Conclusion Compound 1,5,6,9,10 and 12 can be isolated from Diaphragma juglandis Fructus for the first time.
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