去氧腺苷（Deoxyadenosine）是一种去氧核糖核苷酸，可视为腺苷（属于核苷的一种）2号碳上的一个羟基（-OH）被替换成氢原子（-H）。

Deoxyadenosine (symbol dA or dAdo) is a deoxyribonucleoside. It is a derivative of the nucleoside adenosine, differing from the latter by the replacement of a hydroxyl group (-OH) by hydrogen (-H) at the 2' position of its ribose sugar moiety. Deoxyadenosine is the DNA nucleoside A, which pairs with deoxythymidine (T) in double-stranded DNA.