tert-butyl 3-(2-methoxy-2-oxoethyl)-4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decane-8-carboxylate

8-(tert-Butoxycarbonyl)-1-phenyl-1,3,8-triazaspiro[4.5]decan-4-one

1-phenyl-1,3,8-triazaspiro[4.5]dec-2-en-4-one