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US 4,399,277 AGranted
7-Amino-3-phosphonocephalosporanic acid compounds
AssigneeFujisawa Pharmaceutical Co., Ltd.
InventorsTakao Takaya, Toshiyuki Chiba
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Abstract
A compound of the formula: ##STR1## wherein R.sup.2 is hydrogen or lower alkyl, R.sup.3 is carboxy or a protected carboxy group, X is --S-- or ##STR2## and the dotted line bridging the 2- to 4-positions of the formula indicates that the compound may be the 2- or 3-cephem derivative, and pharmaceutically acceptable salts thereof.
Claims5
A compound of the formula:
- ##STR10## wherein R.sup.2 is hydrogen or lower alkyl, R.sup.3 is carboxy or a protected carboxy group, X is --S-- or ##STR11## and the dotted line bridging the 2 to 4-positions of the formula indicates that the compound may be the 2 or 3-cephem derivative, and pharmaceutically acceptable salts thereof.
Dependencies are inferred from the claim text.