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US5763617A Cephalosporins 失效
头孢菌素

Cephalosporins
摘要:
A syn isomer in (R) or (S) form or a mixture thereof of a compound of the formula ##STR1## syn isomer, in the (R) or (S) form or in the form of an (R,S) mixture, in the form of an integral salt or their salts with organic or mineral acids wherein the substituents are as defined in the application and having antibacterial properties.
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