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Fentanyl - Wikipedia
Fentanyl | C22H28N2O | CID 3345 - PubChem
Fentanyl - NIST Chemistry WebBook
Fentanyl | C22H28N2O - ChemSpider
Fentanyl-related compounds and derivatives: current status …
Fentanyl Structure as a Scaffold for Opioid/Non-Opioid …
Fentanyl - NIST Chemistry WebBook
Structure–Activity Relationships of the Fentanyl Scaffold ...
3D structure for Fentanyl (DB00813) | DrugBank Online
Fentanyl | Chem 13 News Magazine | University of Waterloo