652-37-9 7-(Carboxymethyl)theophylline 7-Theophyllineacetic acid 7H-Purine-7-acetic acid, 1,2,3,6-tetrahydro-1,3-dimethyl-2,6-dioxo- NSC52996 Purine-7-acetic acid, 1,2,3,6-tetrahydro-1,3-dimethyl-2,6-dioxo- Theophylline-acetic acid