6-Thio-8-(.beta.-N-piperidylethyl)thiotheophylline 6493-46-5 NSC98001 Theophylline, 8-[(2-piperidinoethyl)thio]-6-thio- Theophylline, 8-[2-(piperidinoethyl)thio]-6-thio- Uric acid, 1,3-dimethyl-8-[2-(piperidinoethyl)thio]-6-thio-