Cephalosporin derivatives
US5049558A · kind A · utility
4Cited by
3References
20Claims
0Family size
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Inventors
Key dates
| Filing date | Sep 19, 1989 |
| Grant date | Sep 17, 1991 |
| Priority date | — |
| Expiry date | Sep 19, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D513/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A cephalosporin derivative of the formula I: ##STR1## in which X is ##STR2## represents one of C-7 acyl groups known in the cephalosporin art, R3 is hydrogen or methoxy, R4 is hydrogen, optionally substituted alkyl or allyl, and R5 is an aromatic heterocyclic ring system which is linked via carbon, and which contains a quaternized nitrogen atom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.