text: <unk>  (INN), (also known as doxophylline) is a xanthine derivative drug used in the treatment of asthma.
  It has antitussive[citation needed] and bronchodilator effects, and acts as a phosphodiesterase inhibitor.
  In animal and human studies, it has shown similar efficacy to theophylline but with significantly fewer side effects.
  Unlike other xanthines,<unk>  lacks any significant affinity for adenosine receptors and does not produce stimulant effects. This suggests that its antiasthmatic effects are mediated by another mechanism, perhaps its actions on phosphodiesterase.
option_0: Doxofylline
option_1: Dalfampridine
option_2: Camylofin
option_3: Nalfurafine
option_4: Nalmefene
option_5: Dicyclomine
option_6: Cefmenoxime
option_7: Dimetacrine