2H-Pyrido(3,2-b)-1,4-oxazine, 3,4-dihydro-4-(2-(1-piperidinyl)ethyl)-, trihydrochloride 4-(2-(1-Piperidinyl)ethyl)-3,4-dihydro-2H-pyrido(3,2-b)-1,4-oxazine trihydrochloride 86979-79-5