英语语法分析

From the 35% EtoAc-petroleum ether portion 1-0-hexanoyl-glycerol ester(12) were isolated.

从35％乙酸乙酯—石油醚部分分离得到了十六碳酸甘油酯（12）。

Methods:Chloroform being solvent, under bath heat, 4 hydroxymethyl caged bicyclic phosphate acylated with pentanoyl chloride and hexanoyl chloride dividedly.

方法：用氯仿作溶剂，在浴温条件下，4 羟甲基笼状双环磷酸酯分别与戊酰氯、己酰氯发生酰化反应。