0 Ampicillin trihydrate CAS 7177-48-2 In APIs, Pharmaceutical Chemicals, Products 7177-48-2,Ampicillin trihydrate,D-(-)-6-(2-Amino-2-phenylacetamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid trihydrate