0-26-00-00575 (Beilstein Handbook Reference) 1H-Purine-8-acetic acid, 2,3,6,7-tetrahydro-1,3-dimethyl-2,6-dioxo- (9CI) 5439-51-0 BRN 0264650 NSC 14365 Theophylline-8-acetic acid