What is "cocaethylene"

n. (context organic compound English) The ethyl ester of benzoylecgonine, structurally similar to cocaine, formed in vivo when cocaine and ethyl alcohol have been ingested simultaneously.

Cocaethylene (ethylbenzoylecgonine) is the ethyl ester of benzoylecgonine. It is structurally similar to cocaine, which is the methyl ester of benzoylecgonine. Cocaethylene is formed in vivo by the liver when cocaine and ethanol coexist in the blood.