Adenosine-D13 is a deuterium-labeled form of Adenosine. Adenosine (T0853) (Adenine riboside) is a widely present endogenous secretion that exerts effects via four G-protein-coupled receptors (A1, A2A, A2B, and A3). It influences nearly all aspects of cellular physiology, including neuronal activity, vascular function, platelet aggregation, and blood cell regulation.