9,9′-[Methylenebis(oxyethane-2,1-diyloxymethylene)]bis(2-amino-1,9-dihydro-6H-purin-6-one); 2-Amino-9-[11-(2-amino-6-oxo-3,6-dihydro-9H-purin-9-yl)-2,5,7,10-tetraoxaundec-1-yl]-1,9-dihydro-6H-purin-6-one; 9,9'-(2,5,7,10-Tetraoxaundecane-1,11-diyl)bis(2-amino-1H-purin-6(9H)-one); 9,9'-(2,5,7,10-tetraoxaundecane-1,11-diyl)bis(2-amino-1,9-dihydro-6H-purin-6-one)