Sub Group: Heterocyclic Compounds Catalog Number: 8194 Formula: C16H17N3O4S CAS Number: 15686-71-2 Molecular Weight: 347.39 Synonyms: (6R,7R)-7-[[(2R)-2-Amino-2-phenylacetyl]amino]-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic AcidAlceph