| 摘要 |
A cephem compound (particularly its crystal) represented by the formula ÄIÜ, wherein X is CH3COOH, CH3CH2COOH or CH3CN, and n is 0 to 5, is useful as an antibacterial agent (particularly anti-MRSA agent) and shows superior quality such as high solid stability, possible long-term stable preservation and the like. <CHEM>
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