|Chemical and physical data|
|Molar mass||297.398 g·mol−1|
|3D model (JSmol)|
HDEP-28 or ethylnaphthidate is a piperidine based stimulant drug, closely related to ethylphenidate, but with the benzene ring replaced by naphthalene. It is even more closely related to HDMP-28, which acts as a potent serotonin–norepinephrine–dopamine reuptake inhibitor with several times the potency of methylphenidate and a short duration of action.
HDEP-28 was banned in the UK as a Temporary Class Drug from June 2015 following its unapproved sale as a designer drug, alongside 4-Methylmethylphenidate.