5-Benzyloxymethyl-4-trimethylsilanyloxy-5H-imidazo[4,5-d]pyridazine
1-(2,3,5-tri-O-benzoyl-β-D-ribofuranosyl)-5-benzyloxymethylimidazo<4,5-d>pyridazin-4-one
3-(2,3,5-tri-O-benzoyl-β-D-ribofuranosyl)-5-benzyloxymethylimidazo<4,5-d>pyridazin-4-one
5-<(benzyloxy)methyl>-1,5-dihydro-4H-imidazo<4,5-d>pyridazin-4-one
4,5-diamino-2-benzyloxymethyl-2H-pyridazine-3-one