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Chemical constituents of Galium verum

ZHAO Chunchao1,SHAO Jianhua1*,CAO Dandan1,ZHANG Yuwei2,LI Xian2 (1.College of Bioscience and Biotechnology,Yangzhou University,Yangzhou 25009,China;2.School of Traditional Chinese Materia Medica,Shenyang Pharmaceutical University,Shenyang 110016,China)  
Objective: To investigate the chemical constituents of the extract of Galium verum.Method: The compounds were isolated by chromatography and identified by spectral data.Result: The eleven compounds obtained were identified as(+)-pinoresinol 4,4′-O-bis-β-D-glucopyranoside(1),epipinoresinol(2),(+)-medioresinol(3),isorhamnetin(4),isorhamnetin 3-O-α-L-rhamnopyranosyl-(1-6)-β-D-glucopyranoside(5),diosmetin(6),diosmetin 7-O-β-D-glucopyranoside(7),quercetin-3-O-β-D-glucopyranoside(8),ursolic acid(9),ursolic aldehyde(10) and rubifolic acid(11).Conclusion: Compounds 1-5 and 9-11 were isolated from this genus for the first time.
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