Synonyms: Theophyllin-7-acetic acid piperazine salt;Piperazine 7-theophyllineacetate;Etophylate;Piperazine theophyllineacetate;Acefyllin piperazinate;Piperazine theophylline ethanoate;1,2,3,6-Tetrahydro-1,3-dimethyl-2,6-dioxo-7H-purine-7-acetic acid compd. with piperazine;Etaphylline;Etaphydel;7H-Purine-7-acetic acid, 1,2,3,6-tetrahydro-1,3-dimethyl-2,6-dioxo-, compd. with piperazine;Minophylline;Acepifylline;Acefyllinpiperazinum;Acefylline piperazine [DCF:INN];Aethaphyllinium;Acefylline piperazine salt;7H-Purine-7-acetic acid,1,2,3,6-tetrahydro-1,3-dimethyl-2,6- dioxo-,compd. with piperazine;Acefyllinum piperazinum [INN-Latin];