1-(2,4-Dichlorobenzoyl) 4-(3,4-chlorophenyl) piperazine [French] 1-(2,4-Dichlorobenzoyl)-4-(3,4-dichlorophenyl)piperazine 197166-37-3 Piperazine, 1-(2,4-dichlorobenzoyl)-4-(3,4-dichlorophenyl)-