N1,O2'-Dimethyladenosine-d3 Monohydriodide is an intermediate in the synthesis of N6,O2'-Dimethyladenosine-d3 (D447417). N6,O2'-Dimethyladenosine-d3 is an isotopic analog of N6,O2'-Dimethyladenosine (D447415), a naturally occurring modified nucleoside in RNA. It was reported in the preparation of alkylated adenosines as antihypertensive agents.