hydroxyl

Glycolipids (glycosyldiacylglycerols) are diacylglycerols with a sugar attached to the unesterified hydroxyl group.

糖酯类物质是由甘油二酯和糖结未酯化的羟基形成的。

In this paper, synthesis of salidroside was reported starting from 4 hydroxyl phenylacetic acid through benzylation, esterification, reduction and glycosidation.

报道了以对羟基苯乙酸为原,苄基化、酯化、还原、甙化等步骤成红景天甙的一种方法.

METHODS The hydroxyl groups of magnolol were protected using ketol reaction and the products were purified by recrystallization from hexane.

方法将厚朴两羟基用缩酮保护,再用正己烷重结晶分离纯化。

The hydroxyl value of epoxy-containing polyester was determined by analyzing acetification principle and using acetyl chloride as acetifier and methylene chloride as solvent.

通对其酰化原理分析,选用乙酰氯作酰化剂、二氯甲烷作酰化溶剂,测定含环氧基聚酯的羟值。

The ring-opening polymerization mechanism of lactide in the presence of hydroxyl compounds was studied by using ferric ethoxide and ferric n-butoxide as catalysts respectively.

这些结果表明在含羟基化物的丙交酯/醇铁聚体系中,羟基化物作为共引发剂参与了丙交酯的开环聚。

Acylation activity of hydroxyl groups in methyl cholicate has been determined by the use of methacryloyl chloride, methacryloyl anhydride and methacrylic acid as the acylating agents.

以甲基丙烯酰氯、甲基丙烯酸酐和甲基丙烯酸作酰化剂，研究了胆酸甲酯分子中羟基的反应活性。

Nuclear magnetic resonance techniques are used to determine the national aleutric acid preferential conformation. The results show that the dithionic hydroxyl radicals are in reciprocal cross bearing.

采用核磁共振谱法测定了国产紫胶桐酸的优势构象,结果表明,其分子中连二羟基处于反交叉位。

The aurone compounds are generally on one plane ,and they have a bigger conjugate system .The inducement of hydroxyl substituents has little influence on their own geometries .

橙酮类化物分子共面性较强,为较大的共轭体系,取代羟基的接入,对橙酮类化物共面性影响不大。