Enantiomers<unk>  is a racemic mixture of two enantiomers, armodafinil ((R)-modafinil) and esmodafinil ((S)-modafinil). Detection in body fluids<unk>  and/or its major metabolite,<unk>  acid, may be quantified in plasma, serum or urine to monitor dosage in those receiving the drug therapeutically, to confirm a diagnosis of poisoning in hospitalized patients or to assist in the forensic investigation of a vehicular traffic violation. Instrumental techniques involving gas or liquid chromatography are usually employed for these purposes. As of 2011, it is not specifically tested for by common drug screens (except for anti-doping screens) and is unlikely to cause false positives for other chemically unrelated drugs such as substituted amphetamines. Reagent testing can be used to screen for the presence of<unk>  in samples. + Colors produced by<unk>  with various reagents RC Marquis Reagent Liebermann Froehde<unk>  Yellow/Orange > Brown Darkening Orange Deep orange/red Structural analogues Many derivatives and structural analogues of<unk>  have been synthesized and studied. Examples of these analogues include adrafinil, CE-123, fladrafinil (CRL-40941; fluorafinil), flmodafinil (CRL-40940; bisfluoromodafinil, lauflumide), and<unk>  sulfone (CRL-41056).
Modafinil
Armodafinil
Methylphenidate
Adrafinil
Dexmethylphenidate
Ethylphenidate
Dimethazan
Fluparoxan