unlabelled : in study i , carried out on 9 asthmatics to investigate whether the bronchodilator and protective effect of intravenous theophylline , dissolved in ethylene diamine ( t.e . ) or proxyphylline and diprophylline ( t.p.d . ) , showed different dose-effect relationships , 100 mg theophylline with t.e. , t.p.d . or nacl ( placebo ) were infused 5 times at 30 minute intervals .
C0039771
theophylline
C0013360
diprophylline