2-amino-9-((2-((2-amino-6-oxo-1H-purin-7(6H)-yl)methoxy)ethoxy)methyl)-1H-purin-6(9H)-one;2-Amino-7-[[2-[(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)methoxy]ethoxy] methyl]-1,7-dihydro-6H-purin-6-one;7,9’-[Ethylene-bis(oxymethylene)] bis (2-amino-1-9-dihydro-6H-purin-6-one)
2-amino-9-((2-((2-amino-6-oxo-1H-purin-7(6H)-yl)methoxy)ethoxy)methyl)-1H-purin-6(9H)-one;2-Amino-7-[[2-[(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)methoxy]ethoxy] methyl]-1,7-dihydro-6H-purin-6-one;7,9’-[Ethylene-bis(oxymethylene)] bis (2-amino-1-9-dihydro-6H-purin-6-one)