Two new benzopyran derivatives,1-[（rel 2S,3R）-3,5,7-trihydroxy-3,4-dihydro-2H-chromen-2-yl]ethanone（1）,and 1-[（rel 25,35）-3,5,7-trihydroxy-3,4-dihydro-2H-chromen-2-yl]ethanone（2）,along with four known flavonoi...Two new benzopyran derivatives,1-[（rel 2S,3R）-3,5,7-trihydroxy-3,4-dihydro-2H-chromen-2-yl]ethanone（1）,and 1-[（rel 25,35）-3,5,7-trihydroxy-3,4-dihydro-2H-chromen-2-yl]ethanone（2）,along with four known flavonoids,prodelphinidin C,prodelphinidin B3,（-）-epi-gallocatechin and（＋）-gallocatechin,were isolated from the stems of Gouania leptostachya DC.var. tonkinensis Pitard.Their structures were determined on the basis of spectroscopic methods including HR-ESI-MS,1D and 2D NMR.Prodelphinidin C exhibited significant inhibitory activity forα-glucosidase.展开更多
目的研究红大戟快速繁殖技术,为人工栽培提供种源。方法以野生红大戟的茎尖作外植体,通过不同的培养基进行诱导培养获得丛生芽,进而生根获得再生植株。结果M S+BA 2.0 m g/L+NAA 0.1 m g/L适合红大戟的丛生芽继代增殖。1/2M S+NAA 1.0 m...目的研究红大戟快速繁殖技术,为人工栽培提供种源。方法以野生红大戟的茎尖作外植体,通过不同的培养基进行诱导培养获得丛生芽,进而生根获得再生植株。结果M S+BA 2.0 m g/L+NAA 0.1 m g/L适合红大戟的丛生芽继代增殖。1/2M S+NAA 1.0 m g/L适宜诱导生根获得健全再生植株。移栽成活率70%。结论本研究得出的方法可为人工栽培红大戟提供种源。展开更多
目的研究茜草科植物红芽大戟Knoxia valerianoidesThorel et P itard的化学成分。方法采用各种色谱技术进行分离纯化,经光谱数据分析鉴定其结构。结果分离得到3个蒽醌类化合物:1,3,5三-羟基-2甲-基-6-甲氧基蒽醌(红大戟素,I),1,3,6三-羟...目的研究茜草科植物红芽大戟Knoxia valerianoidesThorel et P itard的化学成分。方法采用各种色谱技术进行分离纯化,经光谱数据分析鉴定其结构。结果分离得到3个蒽醌类化合物:1,3,5三-羟基-2甲-基-6-甲氧基蒽醌(红大戟素,I),1,3,6三-羟基-5-乙氧甲基蒽醌(II)及1,3二-羟基-2甲-基蒽醌(甲基异茜草素,III)。结论II为新化合物。展开更多
基金the National Science & Technology Major Project "Key New Drug Creation and Manufacturing Program",China(No.2009ZX09301-001)
文摘Two new benzopyran derivatives,1-[（rel 2S,3R）-3,5,7-trihydroxy-3,4-dihydro-2H-chromen-2-yl]ethanone（1）,and 1-[（rel 25,35）-3,5,7-trihydroxy-3,4-dihydro-2H-chromen-2-yl]ethanone（2）,along with four known flavonoids,prodelphinidin C,prodelphinidin B3,（-）-epi-gallocatechin and（＋）-gallocatechin,were isolated from the stems of Gouania leptostachya DC.var. tonkinensis Pitard.Their structures were determined on the basis of spectroscopic methods including HR-ESI-MS,1D and 2D NMR.Prodelphinidin C exhibited significant inhibitory activity forα-glucosidase.
文摘目的研究红大戟快速繁殖技术,为人工栽培提供种源。方法以野生红大戟的茎尖作外植体,通过不同的培养基进行诱导培养获得丛生芽,进而生根获得再生植株。结果M S+BA 2.0 m g/L+NAA 0.1 m g/L适合红大戟的丛生芽继代增殖。1/2M S+NAA 1.0 m g/L适宜诱导生根获得健全再生植株。移栽成活率70%。结论本研究得出的方法可为人工栽培红大戟提供种源。
文摘目的研究茜草科植物红芽大戟Knoxia valerianoidesThorel et P itard的化学成分。方法采用各种色谱技术进行分离纯化,经光谱数据分析鉴定其结构。结果分离得到3个蒽醌类化合物:1,3,5三-羟基-2甲-基-6-甲氧基蒽醌(红大戟素,I),1,3,6三-羟基-5-乙氧甲基蒽醌(II)及1,3二-羟基-2甲-基蒽醌(甲基异茜草素,III)。结论II为新化合物。
