5H-Pyrazino(2,3-d)azepin-2-amine, 6,7,8,9-tetrahydro-7-ethyl-, dihydrochloride 6,7,8,9-Tetrahydro-7-ethyl-5H-pyrazino(2,3-d)azepin-2-amine dihydrochloride 7-Ethyl-2-amino-6,7,8,9-tetrahydro-5H-pyrazino(2,3-d)azepine dihydrochloride 82102-74-7