4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 6-(2,2-dimethyl-5-oxo-4-phenyl-1-imidazolidinyl)-3,3-dimethyl-7-oxo-, monopotassium salt, (2S-(2alpha,5alpha,6beta(S*)))- 4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 6-(2,2-dimethyl-5-oxo-4-phenyl-imidazolinyl)-3,3-dimethyl-7-oxo-, monopotassium salt 5321-32-4 EINECS 226-182-3 H-K Mastitis (Veterinary) Hetacillin potassium Hetacillin potassium [USAN:JAN] Hetacin-K (Veterinary) Natacillin Potassium (2S-(2alpha,5alpha,6beta(S*)))-6-(2,2-dimethyl-5-oxo-4-phenylimidazolidin-1-yl)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo(3.2.0)heptane-2-carboxylate Potassium 6-(2,2-dimethyl-5-oxo-4-phenyl-1-imidazolidinyl)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo(3.2.0)heptane-2-carboxylate Potassium hetacillin