PT  - JOURNAL ARTICLE
AU  - J M Frincke
AU  - G L Henderson
TI  - The major metabolite of fentanyl in the horse.
DP  - 1980 Nov 01
TA  - Drug Metabolism and Disposition
PG  - 425--427
VI  - 8
IP  - 6
4099  - http://dmd.aspetjournals.org/content/8/6/425.short
4100  - http://dmd.aspetjournals.org/content/8/6/425.full
SO  - Drug Metab Dispos1980 Nov 01; 8
AB  - Fentanyl, a potent, synthetic narcotic analgesic, has reportedly been used to "dope" racehorses. Urine was collected from a horse dosed with 70 mg of [3H]fentanyl, and the primary metabolite, a water-soluble, amphoteric compound, was isolated by high-pressure liquid chromatography and identified by spectroscopic analysis. This metabolite was found to be N-[1-(2-phenethyl-4-piperidinyl)] malonanilinic acid.