38429-35-5 5-Thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, 3-(((aminocarbonyl)oxy)methyl)-7-((5-amino-5-carboxy-1-oxopentyl)amino)-7-methoxy-8-oxo- A 16886B A-16886B A16886B cephamycin C