Structure-activity relations. 3. Bronchodilator activity of substituted 6-thioxanthines.
D000818:Animals; D001993:Bronchodilator Agents / Q000494:pharmacology*; D006168:Guinea Pigs; D066298:In Vitro Techniques; D013329:Structure-Activity Relationship; D013440:Sulfides / Q000494:pharmacology; D014132:Trachea / Q000187:drug effects; D014970:Xanthines / Q000494:pharmacology*
D001993:Bronchodilator Agents; D013440:Sulfides; D014970:Xanthines