2,3-Dihydro-N,N,2-triethyl-4H-pyrido(3,2-b)-1,4-oxazine-4-ethanamine trihydrochloride 4H-Pyrido(3,2-b)-1,4-oxazine-4-ethanamine, 2,3-dihydro-N,N,2-triethyl-, trihydrochloride 86979-89-7