4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 6-(((3-carboxy-2-quinoxalinyl)carbonyl)amino)-3,3-dimethyl-7-oxo-, 4,4-dioxide, (2S-(2alpha,5alpha,6beta))- 76788-82-4 Quinacillin sulfone Quinacillin sulphone