[On purine derivatives. Part 1. On bis-theophylline and a symmetrical 3,4-dithia-1,6-diazacyclononane].
D002317:Cardiovascular Agents; D006571:Heterocyclic Compounds / Q000737:chemistry*; D013806:Theophylline
D002317:Cardiovascular Agents; D006571:Heterocyclic Compounds; D013806:Theophylline
HETEROCYCLIC COMPOUNDS/chemistry