Pyran

Methods To establish the effect of Benzo pyran derivatives on rats by grouping randomly and giving medicine .

方法通过随机分组，灌胃给药、对比，确定苯并吡喃衍生物对小鼠血糖的影响。

One Pot Synthesis of Pyrazolo [ 5,4-b ] - γ - pyran Derivatives in Ionic Liquid

在离子液体中一步法合成吡唑[5,4-b]-γ-吡喃衍生物

IR and Raman Spectroscopic Studies on the Complexes of Ytterbium with Pyran Derivatives

吡喃酮类化合物与镱配合物的红外和拉曼光谱研究

Syntheses and Spectra of Pyran Lasing Dyes Photo-dissociation mechanisms in lasing dyes : A laser and flashlamp excitation study

吡喃类激光染料的合成及光谱研究光泵香豆素染料介质光解机理的研究

UV-VIS spectrum and FTIR analysis showed that CLPS-A2 was β - heterosaccharides with pyran and acetyl amino group .

紫外可见吸收光谱和红外光谱的分析结果表明CLPS-A2为具有乙酰氨基结构的β型吡喃多糖。

UV , IR and 1H-NMR analysis , the three fractions of polysaccharide are β - glycosidic linkage of the pyran ring polysaccharide .

经UV、IR和1H-NMR分析可知，三种多糖为β-糖苷键连接的吡喃环多糖。

Under the acid free condition , 3 acetyl 2 hydroxy 6 methyl pyran 4 one ( 8 ) was obtained and its structure was confirmed by X ray diffraction analysis .

在没有酸催化的条件下，反应生成3乙酰基2羟基6甲基-吡喃4酮（8），并通过单晶X射线衍射分析确定了产物的结构；

3H-naphtho [ 2,1-b ] pyrans was the best photochromic materials among pyran derivatives , so most research work was focus on them .

3H-萘并[2,1-b]吡喃是吡喃类化合物中性能最好，研究最多的一类吡喃化合物。

On the basis of coumarin lasing dyes , a series of pyran type lasing dyes have been synthesized by rigidization and cyclization .

在香豆素激光染料的基础上进行刚化环构，合成了10个吡喃类激光染料。

The course of the glutaraldehyde synthesis was briefly introduced . The processes for synthesis of glutaraldehyde by pyridine method , pyran method , oxidation dehydrogenation of 1,5 pentanediol , and cyclopentene oxidation by H 2O 2 and so forth were mainly reviewed .

扼要介绍戊二醛合成方法的发展沿革，对吡啶法、吡喃法、戊二醇氧化脱氢法及环戊烯氧化法等几种戊二醇合成方法进行了评述。

The essential oils in flowers of tree peony cv . ' Xiangyu ' are mainly alcohols , alkanes , esters , ketones and benzene . And it also has small amounts of aldehydes , pyran , alkenes and phenols .

牡丹‘香玉’香气物质醇类、酯类、烷类、芳香烃类、酮类为主，也含有少量醛类，烯类，吡喃和酚类。