1,3-Bis(8-theophylline)propane 1H-Purine-2,6-dione (9CI), 8,8'-(1,3-propanediyl)bis(3,7-dihydro-1,3-dimethyl- 34330-88-6 8,8'-Trimethylenebis[1,3-dimethylpurine-2,6(1H,3H)-dione NSC14406 Theophylline (8CI), 8,8'-trimethylenedi-