(S)-tert-butyl 2-(4-oxo-8-(3-(2-oxoindolin-1-yl)propyl)-1-phenyl-1,3,8-triazaspiro[4.5]decan-3-yl)-2-phenylacetate

tert-butyl 4-((8-(3-(3,3-dimethyl-2-oxoindolin-1-yl)propyl)-4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decan-3-yl)methyl)benzoate

tert-butyl 4-((4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decan-3-yl)methyl)benzoate

tert-butyl 4-((4-oxo-8-(3-(2-oxoindolin-1-yl)propyl)-1-phenyl-1,3,8-triazaspiro[4.5]decan-3-yl)methyl)benzoate

tert-butyl 3-((8-(4-hydroxy-4-phenylbutyl)-4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decan-3-yl)methyl)benzoate