4-(4-(4-Nitrophenyl)-1-piperazinyl)phenol
4-(4-(4-Methoxyphenyl)piperazin-1-yl)aniline
1-(4-Aminophenyl)-4-(4-hydroxyphenyl)piperazine
1-(4-Methoxyphenyl)-4-(4-nitrophenyl)piperazine
4,4'-(Piperazine-1,4-diyl)dibenzaldehyde
1,4-Bis(4-nitrophenyl)piperazine
4,4'-(Piperazine-1,4-diyl)dianiline
