1H-Purine-2,6-dione, 3,7-dihydro-1,3-dimethyl-8-(propylthio)- (9CI) 73908-84-6 8-(N-Propylthio)theophylline 8-n-Propylthiotheophylline NSC 77337 Theophylline, (8-propylthio)- Theophylline, 8-propylthio-