Attention deficit hyperactivity disorder management
There are two major medications derived from methylphenidate's isomers: a racemic mixture of half d-threo-methylphenidate and half l-threo-methylphenidate called methylphenidate (Ritalin, Concerta), and an enantiopure formulation containing just d-threo-methylphenidate called dexmethylphenidate (Focalin).
Scoulerine
Scoulerine, also known as discretamine and aequaline, is a benzylisoquinoline alkaloid that derives from reticuline and is a precursor of berberine. It is found in many plants, including Opium poppy, "Croton flavens", and certain plants in the Erythrina genus.