The present study was designed to determine the chemical constituents and identify new components of the leaves of Aquilaria sinensis (Lour.) Gilg. The compounds were isolated and purified by repeated silica gel, Se...The present study was designed to determine the chemical constituents and identify new components of the leaves of Aquilaria sinensis (Lour.) Gilg. The compounds were isolated and purified by repeated silica gel, Sephadex LH-20, and ODS column chromatography and their structures were elucidated by NMR and HR-ESI-MS spectrometry. Eight megastigmane glycosides and two cucurbitacins were isolated and identified as (95) megastigma-4,7-diene-2,3,9-triol 9-O-β-D-glucopyranoside (1), (9S) megastigma-4(13),7-diene-3,6,9-triol 9-O-β-D-glucopyranoside (2), macarangloside D (3), corchoionoside C (4), staphylionoside H (5), (+) 3-oxo-a-ionol-β-D-glucopyranoside (6), (-) 3-oxo-α-ionol-β-D-glucopyranoside (7), citroside B (8), 2-O-β-D-glucopyranosyl cucurbitacin I (9), bryoamaride (10). Compounds 1 and 2 were newly identified megstigmane glucosides and reported from this genus for the first time.展开更多
目的比较结香与未结香白木香内生细菌群落结构及变化,探讨内生细菌在白木香结香过程中的作用。方法分别提取结香与未结香白木香总DNA,采用细菌16s r DNA通用引物进行扩增,聚合酶链反应-变性梯度凝胶电泳(Polymerase Chain Reaction-Dena...目的比较结香与未结香白木香内生细菌群落结构及变化,探讨内生细菌在白木香结香过程中的作用。方法分别提取结香与未结香白木香总DNA,采用细菌16s r DNA通用引物进行扩增,聚合酶链反应-变性梯度凝胶电泳(Polymerase Chain Reaction-Denaturing Gradient Gel Electrophoresis,PCR-DGGE)比较各样品内生细菌群落结构差异,结合样品薄层色谱(TLC)分析,研究活性成分与内生细菌的关联。结果多食鞘氨醇杆菌Sphingobacterium multivorum在未结香白木香中普遍存在。结香后,内生细菌丰富度和多样性明显增加,PCR-DGGE图谱聚类表明,绝大部分结香样品细菌群态相似性较高,聚在一起;非结香样品间的细菌群态相似性也较高。结论白木香结香前后内生细菌群落存在明显差异,内生细菌可能参与白木香的结香过程。展开更多
基金supported by Special Program for New Drug Innovation of the Ministry of Science and Technology,China(2009ZX311-004,2009ZX0308-004)
文摘The present study was designed to determine the chemical constituents and identify new components of the leaves of Aquilaria sinensis (Lour.) Gilg. The compounds were isolated and purified by repeated silica gel, Sephadex LH-20, and ODS column chromatography and their structures were elucidated by NMR and HR-ESI-MS spectrometry. Eight megastigmane glycosides and two cucurbitacins were isolated and identified as (95) megastigma-4,7-diene-2,3,9-triol 9-O-β-D-glucopyranoside (1), (9S) megastigma-4(13),7-diene-3,6,9-triol 9-O-β-D-glucopyranoside (2), macarangloside D (3), corchoionoside C (4), staphylionoside H (5), (+) 3-oxo-a-ionol-β-D-glucopyranoside (6), (-) 3-oxo-α-ionol-β-D-glucopyranoside (7), citroside B (8), 2-O-β-D-glucopyranosyl cucurbitacin I (9), bryoamaride (10). Compounds 1 and 2 were newly identified megstigmane glucosides and reported from this genus for the first time.
文摘目的比较结香与未结香白木香内生细菌群落结构及变化,探讨内生细菌在白木香结香过程中的作用。方法分别提取结香与未结香白木香总DNA,采用细菌16s r DNA通用引物进行扩增,聚合酶链反应-变性梯度凝胶电泳(Polymerase Chain Reaction-Denaturing Gradient Gel Electrophoresis,PCR-DGGE)比较各样品内生细菌群落结构差异,结合样品薄层色谱(TLC)分析,研究活性成分与内生细菌的关联。结果多食鞘氨醇杆菌Sphingobacterium multivorum在未结香白木香中普遍存在。结香后,内生细菌丰富度和多样性明显增加,PCR-DGGE图谱聚类表明,绝大部分结香样品细菌群态相似性较高,聚在一起;非结香样品间的细菌群态相似性也较高。结论白木香结香前后内生细菌群落存在明显差异,内生细菌可能参与白木香的结香过程。