2-Benzoylquinoxaline 1,4-dioxide derivatives, which also have a hydroxymethyl, formyloxymethyl, alkanoyloxymethyl, alkanoylthiomethyl, alkylthiomethyl, alkylsulfinylmethyl or alkylsulfonylmethyl group at the 3-position. The compounds are useful as antibacterial agents.
1,3-Dihydrofuro[3,4-b]quinoxaline 4,9-dioxides which have an alkoxy and a substituted phenyl group in the 1-position and which are useful as antibacterial agents and agents for promoting growth in farm animals.