3-Carboxy-2-quinoxalinylpenicillin disodium salt 4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 6-(3-carboxy-2-quinoxalinecarboxamido)-3,3-dimethyl-7-oxo-, disodium salt 985-32-0 Disodium quinacillin Quinacillin disodium salt Quinacillin sodium RD 13962