1-Amino-2-aryl-4-(piperidin-1-yl)butane deriv. AIDS-092696 AIDS092696 [(2S)-2-(3,4-Dichlorophenyl)-4-spiro[2,3-dihydrobenzo[b]thiophene-3,4'-piperidine]-10-ylbutyl]methyl(phenylsulfonyl)amine