methyl 4-{[1-[(4-methyl-1-piperidinyl)carbonyl]-2-(2-naphthylsulfonyl)hydrazino]methyl}-1-piperidinecarboxylate

methyl 4-{[2-(2-naphthylsulfonyl)-1-(1-piperidinylcarbonyl)hydrazino]methyl}-1-piperidinecarboxylate

methyl 4-{[1-(1-azepanylcarbonyl)-2-(2-naphthylsulfonyl)hydrazino]methyl}-1-piperidinecarboxylate

methyl 4-{[1-(4-morpholinylcarbonyl)-2-(2-naphthylsulfonyl)hydrazino]methyl}-1-piperidinecarboxylate

methyl 4-{[1-[(cycloheptylamino)carbonyl]-2-(2-naphthylsulfonyl)hydrazino]methyl}-1-piperidinecarboxylate