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

糖类物质是由甘油糖结合未化的羟形成的。

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

方法将厚朴酚两羟用缩酮保,再用正己烷重结晶分离纯化。

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.

以丙烯酰氯、丙烯酸酐丙烯酸作酰化剂，研究了胆酸分子中羟的反应活性。