1784-67-4 1H-Purine-2,6-dione, 8,8'-(1,2-ethanediyl)bis[3,7-dihydro-1,3-dimethyl- 8,8'-Dimethylenebistheophylline 8,8'-Ethylenebistheophylline NSC14404 Theophylline, 8,8'-ethylenebis-