2-ethoxyimino-2-(4-aminopyrimidin-2-yl)acetic acid 、 3-acetoxymethyl-7-aminoceph-3-em-4-carboxylic acid 生成 7-[2-ethoxyimino-2-(4-aminopyrimidin-2-yl)acetamido]cephalosporanic acid 、 7-[2-propargyloxyimino-2-(4-formamidopyrimidin-2-yl)acetamido]cephalosporanic acid