4-Nitroquinoline-1-oxideNitroquinolinesTongue Neoplasms4-Hydroxyaminoquinoline-1-oxideCarcinogensNitro CompoundsTongueHesperidinMutagensPronaseAminoquinolinesMouth NeoplasmsQuinolinesPapillomaPolyaminesAnticarcinogenic AgentsCarcinoma, Squamous CellPrecancerous ConditionsDNA RepairDNAFibroblastsRats, Inbred F344Glutathione TransferaseDNA DamageUltraviolet RaysCell Transformation, NeoplasticPyridines