SL-164 is an analogue of methaqualone developed in the late 1960s by a team at Sumitomo. SL-164 has similar sedative, hypnotic and anticonvulsant properties to the parent compound, but was never marketed for clinical use.
- ^ US 3651230, "Compositions And Methods For Tranquilizing With Substituted 3-Phenyl-4-Quinazolinone Derivatives"
- ^ Saito C, Sakai S, Yukawa Y, Yamamoto H, Takagi H (December 1969). "Pharmacological studies on 2-methyl-3(2'-methyl-4'-chlorophenyl)-5-chloro-4[H)-quinazolinone (SL-164)". Arzneimittel-Forschung. 19 (12): 1945–9. PMID 4985336.