4791-39-3 6-Thio-8-(N-heptylthio)theophylline NSC95907 Theophylline, (8-heptylthio)-6-thio- Theophylline, 8-(heptylthio)-6-thio- Uric acid, 1,3-dimethyl-(8-heptylthio)-6-thio-