英文别名1-[(3,7-dimethyl-2,6-dioxopurin-1-yl)methyl]-3,7-dimethylpurine-2,6-dione; 1,1'-Methylenebis[3,7-dihydro-3,7-dimethyl-1H-purine-2,6-dione]; Pentoxifylline EP impurity E; Pentoxifylline Impurity 5(Pentoxifylline EP Impurity E); 1H-Purine-2,6-dione, 1,1'-methylenebis[3,7-dihydro-3,7-dimethyl-; 1,1'-methylenebis(3,7-dimethyl-1H-purine-2,6(3H,7H)-dione); Pentoxifylline Impurity 5（Pentoxifylline EP Impurity A） 
