Small molecules active against dormant M. tuberculosis by an unknown mechanism of action. Compound 14: 6-(4-(4-fluorophenyl)piperazin-1-yl)-3-(methoxycarbonyl)-2-(trifluoromethyl)quinoxaline 1,4-dioxide; compound 15: ethyl ester of 3-((4-methylpiperazin-1-yl)diazenyl)-1H-indole-2-carboxylic acid; compound 16: ethyl ester of 2-cyclohexyl-5-(quinoxalin-6-yl)thiazole-4-carboxylic acid; compound 17: 2-(1H-benzo[d]imidazol-2-yl)-3-(4-(4-(p-tolyl)piperazin-1-yl)phenyl)acrylonitrile; compound 18: 2-oxo-2,5-dihydropyrano[3,2-b]indole-3-carbonitrile; compound 19: 2-(((2-hydroxyphenyl)amino)methylene)-5,5-dimethylcyclohexane-1,3-dione.