Mar 29 2022: The previously unidentified substance is likely N-(4-fluorophenyl)-N-(1-propionylpiperidin-4-yl)propionamide [the 'propionyl' fluoro-norfentanyl], which has no CAS# at this time. There doesn't appear to be a certified reference standard for this, and this identification is unlikely to be confirmed until there is.
This substance was originally identified in sample #11464 through the Erowid Expert Network.
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This substance was originally identified in sample #11464 through the Erowid Expert Network.