Cephalosporin derivatives
US4007176A · kind A · utility
7Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1974 |
| Grant date | Feb 8, 1977 |
| Priority date | — |
| Expiry date | Nov 12, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D501/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
New cephalosporin derivatives of the formula: ##STR1## wherein one of A and A.sub.1 represents oxygen or sulphur and the other represents sulphur, R.sub.1 represents hydrogen, acetoxy, (5-methyl-1,3,4-thiadiazol-2-yl)thio or (1-methyl-1,2,3,4-tetrazol-5-yl)thio and R.sub.2 represents carboxy, or R.sub.1 represents a pyridinio radical and R.sub.2 represents the carboxylate ion, are therapeutically useful compounds possessing antibacterial properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.