【摘 要】
：
Two new compounds, 8(14),15 isopimaradiene 2 α,3α ,19 triol (1), and 6 α,7β dihydroxy 17(20) cis 5α pregna 16 one (2), together with fou
【机 构】
：
State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botan
【出 处】
：
Chinese Journal of Chemistry
论文部分内容阅读
Two new compounds, 8(14),15 isopimaradiene 2 α,3α ,19 triol (1), and 6 α,7β dihydroxy 17(20) cis 5α pregna 16 one (2), together with four known compounds, a oxygenated rare phyllocladane, phyllocladan 16 α ,19 diol (3), kaempferol 3 O β D galactopyranoside, kaempferol 3 O α L rhamnopyranoside and scopoletin, were isolated from the leaves of Ailanthus triphysa . Structures of 1─3 were elucidated on the basis of spectroscopic data as compared with related compounds.
Two new compounds, 8 (14), 15 isopimaradiene 2 α, 3α, 19 triol (1), and 6 α, 7β dihydroxy 17 (20) cis 5α pregna 16 one phyllocladane, phyllocladan 16 α, 19 diol (3), kaempferol 3 O β D galactopyranoside, kaempferol 3 O α L rhamnopyranoside and scopoletin, were isolated from the leaves of Ailanthus triphysa. Structures of 1-3 were elucidated on the basis of spectroscopic data as compared with related compounds.
其他文献
为促进我国分析技术 ,特别是地球化学分析技术的学术交流 ,增进分析化学家们的互相了解 ,推动分析测试技术的进步 ,中国地质学会拟于２００３年５月在北京召开全国地球化学分析学术报告
美国科学家研制出一种可在中波和长波红外谱区内同时探测三个波段的量子阱红外光电探测器。这种器件具有三层结构,每层结构中都有InGaAs量子阱。在5.9μm-7.0μm、 9.1μm-1
To compare the effectiveness and side effects of various low dose of Mifepristone in combination with Misoprostol and low doses Mifepristone alone in emergency
单句是最小的语言表述单位，而复句，则是单句的扩充。我们在需要表达比较复杂的意思时，把两个或两个以上的单句按照某种逻辑联系组合在一起，这就构成了复句。进入复句后，原先的各个
全国预算会计研究会第二届理事会于2月20—21日在广东省中山市召开。这次会议主要是以党的十五大精神为指导,总结1997年工作,安排1998年工作,会议确定的今年课题研究项目是:
葱、蒜苗、韭菜等虽不像白菜萝卜等大宗蔬菜作物那样量大面广引人注目,但毕竟在市场消费中占有不可或缺一席之地。农民房前屋后边头地角种点葱蒜韭菜既可自食,也可进入城镇市
报告了As_2S_8非晶态薄膜波导的光学截止（optical-stopping）效应的实验过程、初步结果和机理分析.介绍了硫系非晶态As2S8薄膜波导的制备工艺,以及实验光路和光学截止现象的过程
探讨Graves眼病(GO)患者外周血细胞因子水平及雷公藤多苷干预的影响。选择64例中重度急性期GO患者。随机分为治疗组与对照组各32例。2组均行基础治疗,对照组联合强的松0.75 m
常熟市沙家浜镇依托镇集体资产经营投资公司,对镇级农村集体经济组织所属资产实行统一扎口、建帐核算,有效地解决了镇级农村集体资产权属不清、多头核算、运作分散、平调流
With four kinds of mobile phases, methanol water, ethanol water, 2 propanol and acetonitrile water (all containing 0 1% triflu roacetic acid), the displac