US: D (Evidence of risk)
N05CM01 (WHO)
AU: S9 (Prohibited) 
CA: Schedule III 
US: Schedule I
2-Methyl-3-o-tolyl-4(3H)-quinazolinone;3,4-Dihydro-2-methyl-4-oxo-3-o-tolylquinazoline;2-Methyl-3-(2-methylphenyl)-4-(3H)-quinazolinone
72-44-6 Y
6292
DB04833 Y
6055 Y
7ZKH8MQW6T
D00557 Y
ChEMBL282052 Y
Interactive image
O=C1C2=C(C=CC=C2)N=C(C)N1C3=C(C)C=CC=C3
InChI=1S/C16H14N2O/c1-11-7-3-6-10-15(11)18-12(2)17-14-9-5-4-8-13(14)16(18)19/h3-10H,1-2H3 YKey:JEYCTXHKTXCGPB-UHFFFAOYSA-N Y<unk> , brand name Quaalude (sometimes stylized Quāālude) /ˈkweɪluːd/ in the US and Mandrax in the UK, is a central nervous system (CNS) depressant of the quinazolinone class that acts as a sedative and hypnotic.
The sedative–hypnotic activity of<unk>  was first noted by Indian researchers in the 1950s and in 1962<unk>  itself was patented in the US by Wallace and Tiernan. Its use peaked in the early 1970s as a hypnotic, for the treatment of insomnia, and as a sedative and muscle relaxant. It is still produced and used clandestinely as a recreational drug throughout the world. The drug was popular in the 1970s disco club scene.
Methaqualone
Drospirnone
Demecarium bromide
Tritoqualine
Methoxyphenamine
Metaxalone
Mephenoxalone
Chlormethine