Tags: Chemical Compound, Chemical Substance.
Methylecgonidine (anhydromethylecgonine; anhydroecgonine methyl ester) is a chemical intermediate derived from ecgonine or cocaine. Methylecgonidine is a pyrolysis product formed when crack cocaine is smoked making this substance a useful biomarker to specifically test for use of crack cocaine as opposed to powder cocaine which does not form methylecgonidine as a metabolite.