abstract |
The invention relates to a highly stable antibacterial agent which is crystalline 7β-[2-(5 -amino-1,2,4-thiadiazol-3-yl)-2-(1-carboxy-1-methylethoxyimino)acetamido]-3-[3-amino-2-(2-hydroxyethyl)-1-pyrazolio]methyl-3-cephem-4-carboxylate hydrochloride (syn-isomer). |