1H-Purine-2,6-dione, 8-cyclopentyl-3,7-dihydro-1,3-dimethyl- (9CI) 35873-49-5 8-Cyclopentyl theophylline 8-Cyclopentyl-1,3-dimethylxanthine BRN 1133199 NSC 101806 Theophylline, 8-cyclopentyl- Xanthine, 8-cyclopentyl-1,3-dimethyl-