Notes: (±)-threo-Isopropylphenidate (hydrochloride) (Item No. 19264) is an analytical reference standard that is structurally categorized as a phenethylamine. It is closely related to methylphenidate (Item No. 11639) and has been speculated to act as both a dopamine reuptake inhibitor and norepinephrine reuptake inhibitor.{31017} This product is intended for forensic and research uses.