Method 7 - (Z) -2- (5-Amino-1,2,4-thiadiazol-3-yl) -2-methoxyiminoacetamido -3- (1-imidazo 1,2-b pyridazinium) ) to prepare crystals of methyl 3-cephem-4-carboxylate hydrochloride

摘要

Crystals of 7 beta -[(Z)-2-(5-amino-1,2,4-thiadiazol-3-yl)-2-methoxyiminoacetamido]-3-(1- imidazo[ 1,2-b]-pyridazinium)methyl-3-cephem-4-carboxylate hydrochloride or a solvate thereof, which are stable and improved in solubility in water, are usable for an excellent antibacterial agent.