1-Piperazineethanol, alpha-(1,3-dimethyl-7-xanthinylmethyl)-4-phenethyl-, acetate (ester) 19977-18-5 5-26-14-00059 (Beilstein Handbook Reference) BRN 0597557 Theophylline, 7-(2-acetoxy-3-(4-phenethyl-1-piperazinyl)propyl)-