| abstract |
The invention relates particularly to syn compounds of the formula: <IMAGE> wherein R1 is thiadiazolyl, R2 is hydrogen or an aliphatic hydrocarbon residue which may be substituted with halogen, carboxy or esterified carboxy and R5 is carboxy or functionally modified carboxy, and pharmaceutically acceptable salt thereof, processes for making them, pharmaceutical compositions containing them and their use in treating infectious diseases. |