去氧胞苷二磷酸（Deoxycytidine diphosphate，dCDP）是一种核苷酸，是胞苷三磷酸（CTP）的衍生物，比CTP少了一个位于五碳糖2号碳上的-OH基，以及一个磷酸根。

Deoxycytidine diphosphate is a nucleoside diphosphate. It is related to the common nucleic acid CTP, or cytidine triphosphate, with the -OH (hydroxyl) group on the 2' carbon on the nucleotide's pentose removed (hence the deoxy- part of the name), and with one fewer phosphoryl group than CTP .