Methylenedioxypyrovalerone, also known as MDPK or 1-(3,4-methylenedioxyphenyl)-2-pyrrolidinyl-pentan-1-one, is a stimulant drug which acts as a norepinephrine and dopamine reuptake inhibitor, reportedly with four times the potency of methylphenidate.  This compound is reported to be used as a stimulant and an aphrodisiac. It has no history of medical use but has been sold as a "research chemical" (a.k.a. designer drug) for recreational use.
MDPV
Acetylglycinamide chloral hydrate
Aprobarbital
Metharbital
Butalbital
Butabarbital
Heptabarbital
Anthracene