4-m-Tolyl-2H-pyrido(4,3-E)(1,2,4)thiadiazin-3(4H)-one 1,1-dioxide

This compound is a sulfonamide-containing heterocyclic substance used as a reference standard impurity for analytical testing in pharmaceutical research and quality control. Its structure features a fused pyrido-thiadiazine ring system with a 3-methylphenyl substituent.