Piperacillin Sodium Imp. A (EP), Piperacillin Imp. A (EP), Ampicillin Sodium, Piperacillin Sodium Imp. A (EP) as Sodium Salt, Piperacillin Imp. A (EP) as Sodium Salt, (2S,5R,6R)-6-[[(2R)-Aminophenylacetyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2