2-octyl-1-(3,4,5-trimethoxy-benzenesulfonyl)-4-trityl-piperazine
1-(4-methanesulfonyl-benzenesulfonyl)-2-octyl-4-trityl-piperazine
1-(3-methoxy-benzenesulfonyl)-2-octyl-4-trityl-piperazine
1-(2-methoxy-benzenesulfonyl)-2-octyl-4-trityl-piperazine
1-(4-chloro-benzenesulfonyl)-2-octyl-4-trityl-piperazine