Bis[4-[(diethylamino)methyl]benzoic acid]2-[[[(2-amino-1,6-dihydro-6-oxo-9H-purin)-9-yl]methyl]oxy]-1,3-propanediyl ester C??? ??, ??, ??

Bis[4-[(diethylamino)methyl]benzoic acid]2-[[[(2-amino-1,6-dihydro-6-oxo-9H-purin)-9-yl]methyl]oxy]-1,3-propanediyl ester ?? ?? ? ???

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Bis[4-[(diethylamino)methyl]benzoic acid]2-[[[(2-amino-1,6-dihydro-6-oxo-9H-purin)-9-yl]methyl]oxy]-1,3-propanediyl ester ?? ??