| 4-(2-aminoethyl)-1-boc-piperazine |
| 1,1-dimethylethyl-4-(2-aminoethyl)piperazine-1-carboxylate |
| 1- tert-butoxycarbonyl-4-(2-aminoethyl)piperazine |
| 1-(2-aminoethyl)-4-tert-butoxycarbonylpiperazine |
| 1-(2-aminoethyl)-4-boc-piperazine |
| 4-(tert-butoxycarbonyl)-1-(2-aminoethyl)piperazine |
| 4-(2-aminoethyl)piperazine-1-carboxylic acid tert-butyl ester |
| tert-butyl-4-(2-aminoethyl)piperazine-1-carboxylate |
