40581-75-7 5-Thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, 7-((5-amino-5-carboxy-1-oxopentyl)amino)-7-methoxy-3-(((2-methoxy-1-oxo-3-(4-(sulfooxy)phenyl)-2-propenyl)oxy)methyl)-8-oxo-, monosodium salt, (6R-(6-alpha,7-alpha))- 810-A Antibiotic 810 A Cephamycin A sodium salt Sodium cephamycin A