Biomedical subjects

Kang-ping Xu

Publications and source records attributed to Kang-ping Xu.

5 recordsLinked to original sources

PubMed2006

[Studies on the chemical constituents from Asarum Chinese Franch. f. fargesii (Franch.) C. Y. Cheng (II)].

Three compounds were isolated from the roots and stems of Asarum chinese Franch. f. fargesii (Franch.) C. Y. Cheng with column chromatography methods. Their structures were identified as kakuol (I), 2-methoxy-4,5-methylenedioxypropiophenone (II) and pluviatilol (III) on the basis of physicochemical and spectroscopic analysis. The compound II and III were isolated from the genus of Asarum for the first time.

Asarum↗

PubMed2004

[Water-soluble chemical constituents of Swertia davidi Franch].

AIM: To study the active constituents of Swertia davidi Franch. METHODS: Column chromatographies on silica gel, Sephadex LH-20 and Diaion-201 et al. were used to isolate and purify the chemical components. Their structures were identified by UV, IR, MS, NMR and 2D-NMR. RESULTS: These compounds were elucidated as 8-O-beta-D-glucopyranosyl-1, 3, 5-trihydroxyxanthone (I), 5-O-beta-D-glucopyranosyl-1, 8-dihydroxy-3-methoxyxanthone (II), 5-O-beta-D-glucopyranosyl-1, 3, 8-trihydroxyxanthone (III) and swertamarin (IV). CONCLUSION: Compound III is a new xanthone glucoside. The other compounds were isolated from this plant for the first time.

Glucosides↗

PubMed2004

[A new xanthone from Polygala aureocauda Dunn].

AIM: To study the chemical constituents of Polygala aureocauda Dunn.. METHODS: Chemical compounds were isolated by column chromatography and their structures were determined mainly by spectroscopic means (UV, IR, MS, 1HNMR, 13CNMR, HMQC, HMBC). RESULTS: Three compounds were isolated and identified as 3-hydroxy-1,4-dimethoxyxanthone (I), 1, 7-dihydroxy-2, 3-methylendioxyxanthone (II), 7-hydroxy-1-methoxy-2, 3-methylendioxyxanthone (III). CONCLUSION: Compounds I-III were isolated from Polygala aureocauda Dunn. for the first time, whereas compound I is a new xanthone.

Molecular Conformation↗

PubMed2003

[Daviditin B from Swertia davidi Franch].

AIM: To study the active constituents of Swertia davidi Franch. METHODS: Chemical components were isolated by column chromatography and their structures were established mainly by spectroscopic means (UV, IR, NMR, 2D-NMR, MS). RESULTS: Three substances were identified as 2,5-dimethoxyl-1, 4-dicarboxyl benzene (VIII), 1,5,8-trihydroxyl-3,4-dimethoxyl xanthone (IX) and 1,8-dihydroxyl-3-(3'-hydroxyl-butoxy) xanthone (X). CONCLUSION: Compounds VIII and IX were isolated from Swertia davidi Franch, for the first time, whereas compound X is a new xanthone, named daviditin B with antioxygenated activity in vitro.

Antioxidants↗

PubMed2002

[Studies of the chemical constituents of Swertia davida Franch].

AIM: To study the active constituents of Swertia davidi Franch.. METHODS: Chromatography was used to isolate and purify the chemical components, their structures were identified by spectral analysis. RESULTS: Three compounds were identified as 1,7-dihydroxy-3,8-dimethoxyxanthone (gentiacaulein) (V), 1,8-dihydroxy-3,7-dimethoxyxanthone (methylswertianin) (VI) and 1,8-dihydroxy-3,4,7-trimethoxyxanthone (VII). CONCLUSION: Compound VII is a novel xanthone, named daviditin A, the others were isolated from Swertia davidi Franch. for the first time.

Molecular Structure↗