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Systematic (IUPAC) name
Clinical data
Legal status
  • Legal
Routes Oral
CAS number  N
ATC code None
ChemSpider  N
Chemical data
Formula C15H13F2NO3S 
Mol. mass 325.33 g/mol

CRL-40,941 (also referred to as fladrafinil or fluorafinil)[1] is a wakefulness-promoting agent closely related to adrafinil and modafinil. It is the bis(p-fluoro) ring-substituted derivative of adrafinil and has similar effects in animal tests and human trials. The fluorine substitution increases the potency to around twice that of adrafinil. CRL-40,941 was found to produce antiaggressive effects in animals, which adrafinil does not produce.[2]

As of late 2013, CRL-40,941 has been seen on the recreational drug markets.[3]

See also


  1. ^ "Synonyms". ChemSpider. Retrieved 3 June 2014. 
  2. ^ US patent 4489095, Lafon, L., "Halogenobenzhydrylsulfinylacetohydroxamic Acids", issued 1984-12-18, assigned to Laboratoire L. Lafon 
  3. ^ CRL-40,941. Retrieved on 2013-12-18.

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