tert-butyl (S)-4-(2-bromobenzyl)-3-methylpiperazine-1-carboxylate

tert-butyl (S)-4-(4-bromobenzyl)-3-methylpiperazine-1-carboxylate

tert-butyl (S)-3-methyl-4-(4-(pyrrolidin-1-yl)benzyl)piperazine-1-carboxylate

tert-butyl (S)-4-((5-bromofuran-2-yl)methyl)-3-methylpiperazine-1-carboxylate

tert-butyl (S)-3-methyl-4-((4-oxo-4H-chromen-3-yl)methyl)piperazine-1-carboxylate

tert-butyl (S)-3-methyl-4-(3-(trifluoromethyl)benzyl)piperazine-1-carboxylate

tert-butyl (S)-3-methyl-4-(4-(trifluoromethyl)benzyl)piperazine-1-carboxylate

tert-butyl (S)-4-(4-(1H-pyrazol-1-yl)benzyl)-3-methylpiperazine-1-carboxylate

tert-butyl (S)-4-(4-(1H-imidazol-1-yl)benzyl)-3-methylpiperazine-1-carboxylate

tert-butyl (S)-4-((2-hydroxynaphthalen-1-yl)methyl)-3-methylpiperazine-1-carboxylate

tert-butyl (S)-4-(2-hydroxy-5-nitrobenzyl)-3-methylpiperazine-1-carboxylate

tert-butyl (S)-4-(2,4-dimethoxybenzyl)-3-methylpiperazine-1-carboxylate

tert-butyl (S)-4-(3-ethoxy-4-hydroxybenzyl)-3-methylpiperazine-1-carboxylate

tert-butyl (S)-4-(3,4-dimethoxybenzyl)-3-methylpiperazine-1-carboxylate

tert-butyl (S)-4-((2,3-dihydrobenzo[b][1,4]dioxin-6-yl)methyl)-3-methylpiperazine-1-carboxylate

tert-butyl (S)-4-(benzo[b]thiophen-2-ylmethyl)-3-methylpiperazine-1-carboxylate