1) 5,6-Dihydro-OSW-1,5,6-Dihydropennogenin
5,6-双氢-OSW-1,6-双氢偏诺皂甙
3) Pennogenin
[pe'nɔdʒənin]
偏诺皂甙元
1.
Pennogenin is the main bioactive components of Chonglou, one of Chinese traditional medicine, and its good medicinal value and the scarcity of resource has attracted the organic chemist’s attention.
偏诺皂甙元是中药重楼的主要活性成分,其良好的药用价值和稀缺的社会来源受到了有机合成届的关注。
4) dihydro-
二氢;双氢
5) steroidal pennogenin four glycosides
偏诺甾体四糖皂甙
1.
Objective:To observe the content of steroidal pennogenin four glycosides (its structure is (18S?19S) 3 β pennogenin 3 O α L rhamnopyranosy1(1 4) α L rhamnopyranosy1(1 4)[α L rhamnopyranosy1(1 2)] β D glucopyr anosy1) in five species Aspidistra of Guangxi,and establish the basis of exploitation of the steroidal pharmaceutical plants in Guangxi.
目的 :考察广西产 5种蜘蛛抱蛋中偏诺甾体四糖皂甙 (结构式为 :(18S、19S) - 3 β- pennogenin- 3 - O- α- L-rhamnopyranosy1(1- 4 ) - α- L- rhamnopyranosy1(1- 4 ) [α- L- rham nopyranosy1(1- 2 ) ]- β- D- glucopyranosy1)含量 ,为进一步开发利用广西甾体药源植物奠定基础。
6) dihydrogen bond
双氢键
1.
Since the improper blue-shifted H-bond and dihydrogen bond were found,the unusual phenomena have attracted more and more attentions of scientists.
特别是反常蓝移氢键和双氢键的发现,更加引起了科学家们的广泛关注。
2.
The dihydrogen bonds B—H…H—X and traditional H-bonds N—H…X and X—H…X(X=F,Cl,O) between B3N3H6 and each of HF,HCl or H2O were theoretically studied by use of the ab initio quantum mechanics method(MP2).
运用量子化学从头算方法分别研究B3N3H6与HF、HCl和H2O分子间形成的双氢键B—H…H—X与传统氢键N—H…X与X—H…X(X=F,Cl,O)。
3.
The formation of dihydrogen bonds B—H…H—C and traditional H-bonds N—H…F between B3N3H6 and HxCF4-x(x=1-3) is theoretically studied,using the density functional theory,and it is found that upon the formation of the dihydrogen bonds the BH bonds are red-shifted and the CH bonds are blue-shifts and that the formation of the traditional H-bonds make the NH bonds red-shifted.
运用量子化学从头算方法研究了B3N3H6与氟代甲烷HxCF4-x(x=1～3)之间形成的双氢键B—H…H—C和传统氢键N—H…F。
补充资料：双氢磷酸铝
分子式 Al(H2PO4)3
分子量 317.94
CAS号 13530-50-2
无色无味极粘稠的液体或白色粉末。液体相对密度1.44～1.47(25℃)。易溶于水。本品是一种新型的无机合成材料。常温下固化，液体和固体化学结合力强，具有耐高温、抗震、抗剥落、耐高温气流冲刷、红外线吸收能力强和绝缘性能良好等特点。
用途 用作耐火材料的粘合剂。
包装储运 液体产品用聚乙烯塑料桶包装；粉状产品用内衬聚乙烯塑料袋的聚丙烯编织袋包装。 应贮存在通风、干燥的库房中。运输时应防雨防潮。装卸时要轻拿轻放，防止撞击倒置，防止包装破损。 失火时，可用水、砂土、二氧化碳灭火器扑救。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条