19138-34-2 4,6-Dimethyl-2-(1-oxide-4-pyridyl)-5,6-dihydro-4H-1,3,4-thiadiazine hydrochloride 4H-1,3,4-Thiadiazine, 5,6-dihydro-4,6-dimethyl-2-(1-oxide-4-pyridyl)-, hydrochloride 5,6-Dihydro-4,6-dimethyl-2-(1-oxide-4-pyridyl)-4H-1,3,4-thiadiazine hydrochloride