116763-38-3 1H-Purine-2,6-dione, 3,7-dihydro-1,3-dimethyl-7-(1,3-dithiolan-2-ylmethyl)-, S-oxide, cis- cis-3,7-Dihydro-1,3-dimethyl-7-(1,3-dithiolan-2-ylmethyl)-1H-purine-2,6-dione S-oxide cis-7-(1,3-Dithiolan-2-ylmethyl)theophylline-1S-oxide