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A case of acute intoxication due to combined use of fentanyl and 3,4-dichloro-N-[2-(dimethylamino)cyclohexyl]-N-methylbenzamide (U-47700).
trace amounts of fentanyl (0.0035%, m/m) and U-47700 (0.0012%, m/m) were identified by gas chromatography mass spectrometry. U-47700 is an opioid analgesic drug, considered to have a potency of ...