1-(2,5-Dichlorobenzenesulfonyl) 4-(3-chlorophenyl) piperazine [French] 1-(3-Chlorophenyl)-4-((2,5-dichlorophenyl)sulfonyl)piperazine 197166-38-4 Piperazine, 1-(3-chlorophenyl)-4-((2,5-dichlorophenyl)sulfonyl)-