1-Piperazineethanol, alpha-(1,3-dimethyl-7-xanthinylmethyl)-4-phenethyl- 19971-99-4 5-26-14-00058 (Beilstein Handbook Reference) BRN 0593338 Theophylline, 7-(2-hydroxy-3-(4-phenethyl-1-piperazinyl)propyl)-