发明授权
US4285940A Cephalosporin derivatives, and antibacterial drugs comprising said derivatives 失效
头孢菌素衍生物和包含所述衍生物的抗菌药物

Cephalosporin derivatives, and antibacterial drugs comprising said
derivatives
摘要:
New cephalosporin derivatives having the general formula: ##STR1## wherein R.sub.1 and R.sub.2 each represents hydroxy or acyloxy and their salts, and processes for the production thereof. The cephalosporin derivatives of the present invention are useful as antibacterial drugs.
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