C. kyselina (6R,7R)-3-acetyloxymethyl-7- {(Z)-2-[2-(formylamino)thiazol-4-yl]-2-methoxyimino-acetamido}-8-oxo-5-thia-1-azabicyklo[4,2,0]okt-2-en-2-karboxylová(N-formylcefotaxim),