Methylvanillylecgonine or vanillylmethylecgonine is a cocaine analog and metabolite of cocaine found in human urine (possibly with co-ingestion of vanillin-vanilla containing products, as a result of cleavage and binding in vivo but more probably the result of the same metabolic pathways by which vanillylmandelic acid is formed)
^Smith, R. Martin; Poquette, Michael A.; Smith, Paula J., (1984). "Hydroxymethoxybenzoylmethylecgonines: New metabolites of cocaine from human urine". Journal of Analytical Toxicology8 (1): 29–34. doi:10.1093/jat/8.1.29. PMID6708474.