23277-71-6 AMPICILLIN POTASSIUM EINECS 245-550-4 Potassium (2S-(2alpha,5alpha,6beta(S*)))-6-(aminophenylacetamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo(3.2.0)heptane-2-carboxylate