摘要 |
A cephem compound (particularly its crystal) represented by the formula [I], wherein X is CH<SUB>3</SUB>COOH, CH<SUB>3</SUB>CH<SUB>2</SUB>COOH or CH<SUB>3</SUB>CN, 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.
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