1H-Purine-2,6-dione, 8-(aminomethyl)-3,7-dihydro-1,3-dimethyl-, monohydrochloride 35718-21-9 8-(Aminomethyl)-3,7-dihydro-1,3-dimethyl-1H-purine-2,6-dione monohydrochloride 8-Aminomethyl-1,3-dimethylxanthine hydrochloride Theophylline, 8-(aminomethyl)-, monohydrochloride