5'-(''N''-Ethylcarboxamido)adenosine (NECA) is a

nucleoside Nucleosides are glycosylamines that can be thought of as nucleotides without a phosphate group. A nucleoside consists simply of a nucleobase (also termed a nitrogenous base) and a five-carbon sugar (ribose or 2'-deoxyribose) whereas a nucleotid ...

that is a non-selective

adenosine receptor agonist An adenosine receptor agonist is a drug which acts as an agonist of one or more of the adenosine receptors. Examples include the neurotransmitter adenosine, its phosphates, adenosine monophosphate (AMP), adenosine diphosphate (ADP), and adenosine t ...

. It has been used as a biochemical tool in the study of the function of adenosine receptors.

References

Nucleosides Adenosine receptor agonists Purines Carboxamides {{Carbohydrate-stub