[Studies on piperazine compounds. 3. Syntheses of piperazinoalkyltheophylline derivatives].
D055598:Chemical Phenomena; D002621:Chemistry; D010879:Piperazines / Q000138:chemical synthesis*; D013806:Theophylline / Q000138:chemical synthesis*
D010879:Piperazines; D013806:Theophylline