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Cephamycins are a group of beta-lactam antibiotics. They are very similar to cephalosporins, and the cephamycins are sometimes classified as cephalosporins. Like cephalosporins, cephamycins are based upon the cephem nucleus. Unlike most cephalosporins, cephamycins are a very efficient antibiotic against anaerobic microbes. Cephamycins were originally produced by ''Streptomyces'', but synthetic ones have been produced as well. Cephamycins possess a methoxy group at the 7-alpha position. In addition, cephamycins have been shown to be stable against extended-spectrum beta-lactamase (ESBL) -producing organisms, although their use in clinical practice is lacking for this indication. ==Examples== Cephamycins include: * Cefoxitin * Cefotetan * Cefmetazole 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Cephamycin」の詳細全文を読む スポンサード リンク
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