153-61-7 (FREE ACID) 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid, 3-[(acetyloxy)methyl]-8-oxo-7-[(2-thienylacetyl)amino]-, (6R,7R)- 58-71-9 (SODIUM) AIDS-007640 AIDS007640 Cephalothin