(E)-1,1'-(5-methyl-7-oxoundec-5-ene-1,11-diyl)bis(3,7-dimethyl-1H-purine-2,6(3H,7H)-dione); 3,7-Dihydro-3,7-dimethyl-1-[(5E)-5-methyl-7-oxo-11-(2,3,6,7-tetrahydro-3,7-dimethyl-2,6-dioxo-1H-purin-1-yl)-5-undecen-1-yl]-1H-purine-2,6-dione; 1,1'-[(5E)-5-Methyl-7-oxo-5-undecene-1,11-diyl]bis[3,7-dihydro-3,7-dimethyl-1H-purine-2,6-dione; Pentoxifylline EP Impurity J
