1-Piperazinecarboxylic acid, 4-[2-(aminocarbonyl)-5-benzofuranyl]-, 1,1-dimethylethyl ester
1,1-Dimethylethyl 4-[2-(aminocarbonyl)-5-benzofuranyl]-1-piperazinecarboxylate
5-(4-tert-Butoxycarbonyl-2-piperazinyl)benzofuran-2-carboxamide
5-[4-(tert-Butoxycarbonyl)piperazin-1-yl]benzofuran-2-carboxamide