Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Heterocyclic carbon compounds containing a hetero ring...
Patent
1990-08-23
1992-06-30
Rizzo, Nicholas S.
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Heterocyclic carbon compounds containing a hetero ring...
540225, 540221, 514206, C07D50146, A61K 31545
Patent
active
051263360
ABSTRACT:
This invention relates to novel cephalosporin derivatives of the formula ##STR1## wherein R.sup.1 is hydrogen, a straight, branched, or cyclic lower alkyl group having up to six carbon atoms or a radical of the formula ##STR2## in which R.sup.3 and R.sup.4 are each independently hydrogen, methyl or ethyl, or R.sup.3 and R.sup.4, taken together with the carbon atom to which they are attached, may be a cycloalkylidene ring containing from 3 to 5 carbon atoms;
REFERENCES:
patent: 4486586 (1984-12-01), Narita et al.
patent: 4677100 (1987-06-01), Nakagawa et al.
patent: 4814328 (1989-03-01), Nakagawa et al.
patent: 4906623 (1990-03-01), Matsumura et al.
Iimura Seiji
Imae Kiyoto
Kamachi Hajime
Masuyoshi Shinji
Naito Takayuki
Bristol--Myers Squibb Company
Han William T.
Rizzo Nicholas S.
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