Adenosine

**Semantic type:** Nucleic Acid, Nucleoside, or Nucleotide

**Definition:** A ribonucleoside comprised of adenine bound to ribose, with vasodilatory, antiarrhythmic and analgesic activities. Phosphorylated forms of adenosine play roles in cellular energy transfer, signal transduction and the synthesis of RNA.

**Synonyms:** - ADENOSINE - ADENOSINE