19971-97-2 5-26-14-00058 (Beilstein Handbook Reference) 7-(2-Hydroxy-3-(4-(2-hydroxyethyl)-1-piperazinyl)propyl)theophylline BRN 0631574 Theophylline, 7-(2-hydroxy-3-(4-(2-hydroxyethyl)-1-piperazinyl)propyl)-