19971-87-0 5-26-14-00015 (Beilstein Handbook Reference) 7-(2-(4-Benzyl-1-piperazino)ethyl)theophylline BRN 0586260 Piperazine, 1-benzyl-4-(1,3-dimethylxanthin-7-yl)ethyl- Theophylline, 7-(2-(4-benzyl-1-piperazinyl)ethyl)-