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US 4,291,031 AGranted
3-Phosphonocephalosporanic acid derivatives, and pharmaceutical composition comprising the same
AssigneeFujisawa Pharmaceutical Co., Ltd.
InventorsTakao Takaya, Toshiyuki Chiba
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Abstract
Novel 3-phosphonocephalosporanic acid derivatives and pharmaceutically acceptable salts thereof, which have antimicrobial activities; processes for the preparation thereof; pharmaceutical compositions comprising the same; and a method of using the same therapeutically for the treatment of infectious diseases in human beings or animals are disclosed.
Claims17
A compound of the formula:
- ##STR8## wherein R.sup.1 is acylamino,
- R.sup.2 is hydrogen or lower alkyl,
- R.sup.3 is carboxy or a protected carboxy group,
- X is --S--or ##STR9## and the dotted line bridging the 2 to 4-positions of the formula indicates that the compound may be 2 or 3-cephem derivative, and
- pharmaceutically acceptable salts thereof.
2 more elements
Dependencies are inferred from the claim text.