title: Identification of flavonoids in the stems and leaves of Scutellaria baicalensis Georgi.
abstract: Scutellaria baicalensis Georgi (S. baicalensis), a perennial herb of the Labiatae family, is a well-known traditional Chinese medicine. In the present study, a comprehensive qualitative analysis of flavonoids in the stems and leaves of S. baicalensis was performed. Under the optimized experimental conditions, 21 flavonoids were clearly detected. 17 of them were successfully identified based on the on-line UV and MS(n) data and were sequentially confirmed by the literature search. The rest 4 flavonones, which were not on-line identified, were successfully isolated and were identified by 1D and 2D NMR. One of them, 5,6,7,3',4'-pentahydroxy flavanone-7-O-glucuronide (2) is a new compound.
authors: Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research, Ministry of Education, Hunan Normal University, Changsha, China.
authors: Guozhu
authors: G
authors: Liu
authors: Nautiyal
authors: N
authors: Rajesh
authors: Xiaosong
authors: X
authors: Wang
authors: Mingshan
authors: M
authors: Zhang
authors: Qin
authors: Q
authors: Wu
authors: Shengjun
authors: S
authors: Li
authors: Bo
authors: B
authors: Chen
authors: Shouzhuo
authors: S
authors: Yao
mesh_terms: D002851:Chromatography, High Pressure Liquid; D044950:Flavanones / Q000737:chemistry* / Q000302:isolation & purification; D020719:Glucuronides / Q000737:chemistry* / Q000302:isolation & purification; D019906:Nuclear Magnetic Resonance, Biomolecular; D018515:Plant Leaves / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D031364:Scutellaria baicalensis / Q000737:chemistry*
chemical_list: D044950:Flavanones; D020719:Glucuronides