((7R,8R)-7-Formyl-1,4-dioxa-spiro[4.5]dec-8-yl)-carbamic acid benzyl ester

benzyl ((7S,8R)-7-(((3-(4-fluorophenyl)propyl)(methyl)amino)methyl)-1,4-dioxaspiro[4.5]decan-8-yl)carbamate

benzyl (1R,2S)-2-(((3-(4-fluorophenyl)propyl)(propyl)amino)methyl)-4-oxocyclohexylcarbamate

benzyl ((1R,2S)-2-(((3-(4-fluorophenyl)propyl)(methyl)amino)methyl)-4-(N-methylacetamido)cyclohexyl)carbamate

benzyl (1R,2S,4R)-4-amino-2-(((3-(4-fluorophenyl)propyl)(propyl)amino)methyl)-cyclohexylcarbamate