Pyrazine-2-carbothioamide N'-Hydroxy-2-pyrazinecarboximidamide 2-Acetyl-3-methylquinoxalinediium-1,4-diolate Pyrazine-N,N'-dioxide 2,3-dimethylquinoxaline 1,4-dioxide 3-Amino-2-quinoxalinecarbonitrile 1,4-dioxide Benzo[a]phenazine 12-oxide 2-(Ethoxycarbonyl)-3-methylquinoxalinediium-1,4-diolate 2-(Methoxycarbonyl)-3-methylquinoxalinediium-1,4-diolate 2-Methylquinoxalinediium-1,4-diolate