1H-Purine-2,6-dione, 3,7-dihydro-1,3-dimethyl-8-(4-methyl-1-piperazinyl)- 4-26-00-03988 (Beilstein Handbook Reference) 52943-65-4 BRN 0303207 N(sup 1)-(8-Teofillina)-N(sup 4)-metilpiperazina [Italian] N(sup 1)-(Theophyllinyl-8)-N(sup 4)-methylpiperazine