【摘 要】
:
A precursor 9 of isosarcophytol-A(1)was prepared from(■)-farnesol(3)through 6 steps.Isosarcophytol-A(1),a cembrane-type diterpenoid,was first isolated fromustr
论文部分内容阅读
A precursor 9 of isosarcophytol-A(1)was prepared from(■)-farnesol(3)through 6 steps.Isosarcophytol-A(1),a cembrane-type diterpenoid,was first isolated fromustralian soft coral(Nephthea brassica)in 1982,and its structure was estab-shed as(1,3,7,11-all ■,13
其他文献
Benzylsulfonamide was used as a source of nitrogen in the syn-thesis of azacrown ethers,and the cyclic intermediates were easily deben-zylsulfonylated by treati
目的分析珠海市区儿童全血微量元素含量,了解本地区儿童健康状况,指导儿童合理膳食,及时补充儿童生长发育所需微量元素,预防相关疾病的发生。方法随机抽取2011年7月—2012年6
Normal Haman Spectra(NRS) of solid PMT (1-phenyl-5-mercaptotetrazole) and MBT (2-mercaptobenzothiazole) and their surface enhanced Raman spectra (SERS) adsorbed
毁损肺是指一侧肺有广泛的不可逆的病灶,且其功能完全丧失的良性病变。其原因分先天和后天2种。临床上常见的有狭窄性支气管内膜结核、支气管扩张症、广泛肺纤维化、多发肺囊
目的 探讨健康教育在结核病人治疗中的作用。方法 2007年1月至2010年1月门诊或住院结核病患者198例,随机分为健康教育组100例,常规护理组98例观察2组观察项目知晓率。结果
The azeotrope disappeared when the formic acid-water mixtureswere treated by membrane distillation. Membrane distillation were used forseparation of formic acid
The complex K<sub>3</sub>H<sub>4</sub>GeW<sub>9</sub>V<sub>3</sub>O<sub>40</sub>·8H<sub>2</sub>O crystallized in a monocliinie system with space group P2,
a new triterpene compound was isolated from the stems and leaves of Panax ginseng C. A. Meyer and established as 3β, 6α, 12β-trihydroxy-dammar-20(21), 24-die
目的分析颅脑外伤并发脑性盐耗综合征(CSWS)的病因、病理、及诊治经验。方法回顾分析颅脑外伤并发CSWS的12例病人的诊治过程。结果 12例病人中,除1例死于外伤性脑梗死外,11例病
满足社会各群体的需求是历史街区保护的最终目标,也是保护性建成环境质量评判的出发点,同时社会各群体的需求是随着社会经济文化等发展而不断地变化的,也导致了历史街区的保