for the following products
Ceftazidime side chain acid | Ethyl (Z)-2-(2-aminothiazol-4-yl)-2-(1-tert-Butoxycarbonyl-1-methyl)ethoxyiminoacetate | Ethyl 2-(2-aminothiazole-4-yl)-2-(1-tert-butoxycarbonyl-1-methyl)-ethoxyiminoacetate and Ethyl (Z)-2-(2-aminothiazol-4-yl)-2-(2-tert-Butoxycarbonylprop-2-oxyimino) acetate
