发明授权
US4567275A Cephem and cepham compounds and processes for preparation thereof 失效
Cephem和cepham化合物及其制备方法

Cephem and cepham compounds and processes for preparation thereof
摘要:
The cephalosporin intermediate 2-(5-amino-1,2,4, thiadiazol-3yl)glyoxylic acid has been prepared.
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