目的：预测硫酸庆大霉素合剂的贮存期。
Objective:To estimate the expiration date of Gentamycin Sulfate mixture.
用硫酸乙酐混合物作环合剂，制备了氟嗪酸中间体．该方法具有反应条件温和、价格便宜、后处理简单的优点，适用于工业化生产。
Sulfuric acid and acetic anhydride were used as a cyclizing agent to prepare Ofloxacin intermediate. The reaction could be carried out under moderate conditions and facilitate industrial produce.
结论：0 . 5%硫酸锌能促进急性病毒性口炎溃疡愈合，锌剂与复方大青叶合剂联合应用能缩短急性疱疹性口炎的病程。
Conclusion: 0 5% zinc sulfate can promote ulcer healing in acute herpetic stomatitis, and 0 5% zinc sulfate combined with co Daqingye mixture is suitable for acute herpetic stomatitis.
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