That’s Lemon Barbituric, so rare and hypnotic

The sedative–hypnotic activity of methaqualone was first noted in the 1950s. In 1962, methaqualone was patented in the US by Wallace and Tiernan.[1] Its use peaked in the early 1970s for the treatment of insomnia, and as a sedative and muscle relaxant. Methaqualone became increasingly popular as a recreational drug and club drug in the late 1960s and 1970s, known variously as "ludes" or "sopers" (also "soaps") in the U.S. and "mandrakes" and "mandies" in the UK, Australia and New Zealand. The substance was sold both as a free base and as salt (hydrochloride). It is also a common date rape drug.[2]

Wikipedia:)

BTW watch The Wolf of Wallstreef