dyphylline(+-)-7-(2,3-dihydroxypropyl)theophylline(+-)-diprophylline(+-)-dyphylline(1,2-dihydroxy-3-propyl)thiophyllin1,3-dimethyl-7-(2,3-dihydroxypropyl)xanthine7-(2,3-dihydroxypropyl)-1,3-dimethylxanthine7-(2,3-dihydroxypropyl)-3,7-dihydro-1,3-dimethyl-1H-purine-2,6-dione7-(2,3-dihydroxypropyl)theophylline7-(beta,gamma-dihydroxypropyl)theophyllineDihydroxypropyl theopylinDiprophyllineDyphylline