tert-butyl 8-(3-ethoxy-4-hydroxybenzyl)-2,8-diazaspiro[4.5]decane-2-carboxylate

tert-butyl 8-(2,4-dimethoxybenzyl)-2,8-diazaspiro[4.5]decane-2-carboxylate

tert-butyl 8-(2-hydroxy-5-nitrobenzyl)-2,8-diazaspiro[4.5]decane-2-carboxylate

tert-butyl 8-((2-hydroxynaphthalen-1-yl)methyl)-2,8-diazaspiro[4.5]decane-2-carboxylate

tert-butyl 8-(4-(1H-imidazol-1-yl)benzyl)-2,8-diazaspiro[4.5]decane-2-carboxylate

tert-butyl 8-(4-(1H-pyrazol-1-yl)benzyl)-2,8-diazaspiro[4.5]decane-2-carboxylate

tert-butyl 8-(4-(trifluoromethyl)benzyl)-2,8-diazaspiro[4.5]decane-2-carboxylate

tert-butyl 8-(3-(trifluoromethyl)benzyl)-2,8-diazaspiro[4.5]decane-2-carboxylate

tert-butyl 8-((4-oxo-4H-chromen-3-yl)methyl)-2,8-diazaspiro[4.5]decane-2-carboxylate

tert-butyl 8-((5-bromofuran-2-yl)methyl)-2,8-diazaspiro[4.5]decane-2-carboxylate

tert-butyl 8-(4-(pyrrolidin-1-yl)benzyl)-2,8-diazaspiro[4.5]decane-2-carboxylate

tert-butyl 8-(4-(diethylamino)benzyl)-2,8-diazaspiro[4.5]decane-2-carboxylate

tert-butyl 8-(4-bromobenzyl)-2,8-diazaspiro[4.5]decane-2-carboxylate

tert-butyl 8-(2-bromobenzyl)-2,8-diazaspiro[4.5]decane-2-carboxylate

tert-butyl 8-((6-bromopyridin-2-yl)methyl)-2,8-diazaspiro[4.5]decane-2-carboxylate

tert-butyl 8-((2,2-difluorobenzo[d][1,3]dioxol-5-yl)methyl)-2,8-diazaspiro[4.5]decane-2-carboxylate