41849-38-1 5-Thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, 3-((acetyloxy)methyl)-7-((5-amino-5-carboxy-1-oxopentyl)amino)-7-methoxy-8-oxo-, (6R-(6-alpha,7-alpha,7(R*)))- 7-Methoxycephalosporin C A-16884 Antibiotic A 16884