基本释义:

n.止头痛药，助消化药，镇静剂

实用例句

This product with Br 2 was obtained 2 - bromo - 4,5 - hydroxymethoxybenzaldehyde through bromination.

再溴代得到2-溴 -4,5-二甲氧基苯甲醛,收率为91.9%,并分析溴代过程中甲酰基的邻位效应及溴代产物的稳定性.

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Objective: A new approach to prepare α - bromo - 4 - benzyloxy acetophenone was introduced.

目的: 报道一种合成α - 溴-4-苄氧苯基乙酮的新方法.

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A method for the determination of 6 - bromo - 2 - naphthol and 2 - naphthol is described.

采用高效液相色谱法同时测定了6-嗅-2-萘酚和 2- 萘酚的含量.

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Methods: α - Bromo - 4 - benzyloxy acetophenone is synthesized with 4 - hydroxy acetophenone and bromonium as materials and methanol as solvent.

方法: 以甲醇为溶剂,以对羟基苯乙酮和溴为原料制备了α - 溴-4-苄氧苯基苯乙酮.

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