?ACA-Analogue of Cefpodoxime Proxetil ; (1RS)-1-[[(1-Methylethoxy)carbonyl]oxy]ethyl (6R,7R)-3-(acetoxymethyl)-7-[[(2Z)-2-(2-aminothiazol4-yl)-2-(methoxyimino)acetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate ;