(4-Fluorophenyl)(4-(4-fluorophenyl)-4-hydroxy-1-methyl-3-piperidinyl)methanone 21221-18-1 4-Fluorphenyl-4-(4-fluorphenyl)-4-hydroxy-1-methyl-3-piperidyl keton Flazalone Flazalone [USAN:INN:BAN] NSC 102629