1H-Purine-2,6-dione, 8-(heptylthio)-3,7-dihydro-1,3-dimethyl- (9CI) 73908-75-5 8-(N-Heptylthio)theophylline 8-n-Heptylthiotheophylline NSC 77347 Theophylline, (8-heptylthio)- Theophylline, 8-heptylthio-