7-Mac

It is not Cefmetazole Impurity 23 itself, but rather a primary precursor molecule used to manufacture pure cefmetazole. Cefmetazole Impurity 23 is a separate, distinct chemical entity that results as an unintended byproduct of the synthesis process or degradation. “7-MAC” (7-alpha-methoxycephalosporanic acid derivative) is a key intermediate employed to synthesize the antibiotic cefmetazole.

API Name Cefmetazole
CAS No 56610-72-1
Molecular Formula C24H24N6O4S2
Molecular Weight 524.6 g/mol
Synonyms benzhydryl (6R,7S)-7-amino-7-methoxy-3-[(1-methyltetrazol-5-yl)sulfanylmethyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate