theophylline, dimethylxanthine molecule. it is purine alkaloid, xanthine derivative. vasodilator, antiinflammatory drug. skeletal

alkaloid antiinflammatory asthmatic atom atomic blue bronchodilator carbon chemical chemistry dark dimethylxanthine drawing drug flat formula hydrogen icon illustration methylxanthine molecular molecule muscle organic oxygen purine relaxant structural structure theophylline vasodilator white xanthine