tert-butyl 4-(1-{[(1,1,1-trifluoro-2-methylpropan-2-yl)oxy]carbonyl}piperidin-4-yl)piperazine-1-carboxylate

1,1,1-trifluoro-2-methylpropan-2-yl 4-[4-({2-[(ethylcarbamoyl)amino]-6-methyl-1-benzothiophen-3-yl}carbonyl)-piperazin-1-yl]piperidine-1-carboxylate hydrochloride

1,1,1-trifluoro-2-methylpropan-2-yl 4-{4-[(2-aminothieno[3,2-b]pyridin-3-yl)carbonyl]piperazin-1-yl}piperidine-1-carboxylate

1,1,1-trifluoro-2-methylpropan-2-yl 4-(4-{[2-amino-6-(trifluoromethyl)-1-benzothiophen-3-yl]carbonyl}piperazin-1-yl)piperidine-1-carboxylate

1,1,1-trifluoro-2-methylpropan-2-yl 4-[4-({2-[(4-methoxybenzyl)amino]thieno[3,2-b]pyridin-3-yl}carbonyl)piperazin-1-yl]piperidine-1-carboxylate

1,1,1-trifluoro-2-methylpropan-2-yl 4-{4-[(2-amino-6-fluoro-1-benzothiophen-3-yl)carbonyl]piperazin-1-yl}piperidine-1-carboxylate

1,1,1-trifluoro-2-methylpropan-2-yl 4-{4-[(2-amino-6-methoxy-1-benzothiophen-3-yl)carbonyl]piperazin-1-yl}piperidine-1-carboxylate