1784-67-4 1H-Purine-2,6-dione, 8,8'-(1,2-ethanediyl)bis(3,7-dihydro-1,3-dimethyl- (9CI) 8,8'-Dimethylene-bis-theophylline 8,8'-Ethylenebistheophylline BRN 1192852 NSC 14404 Theophylline, 8,8'-ethylenebis-