tert-butyl 4-(benzofuran-4-yl)piperazine-1-carboxylate

tert-butyl 4-(benzofuran-5-yl)piperazine-1-carboxylate 1-Piperazinecarboxylic acid, 4-(7-benzofuranyl)-, 1,1-dimethylethyl ester tert-Butyl 4-(5-chloro-2-formylphenyl)piperazine-1-carboxylate 2-(4-Boc-piperazino-1-yl)-4-bromobenzaldehyde 1-Boc-4-(5-Methylthiazol-2-yl)piperazine

1-Piperazinecarboxylic acid, 4-(5-nitro-2-pyrimidinyl)-, 1,1-dimethylethyl ester 4-(5-Aminopyridin-2-yl)piperazine-1-carboxylic acid tert-butyl ester TERT-BUTYL 4-(5-CHLOROPYRAZIN-2-YL)PIPERAZINE-1-CARBOXYLATE tert-butyl 4-(6,7-dimethoxyquinazolin-4-yl)piperazine-1-carboxylate 1-Piperazinecarboxylic acid, 4-(5-amino-2-pyrimidinyl)-, 1,1-dimethylethyl ester