4-Hydroxy-3-methyl-2-butanone
4-Benzyloxy-2-butanone
3-Methylthio-2-butanone
2-Mercapto-3-butanone
4-(Cbz-amino)-2-butanone
3-Hydroxy-3-methyl-2-butanone
1-Bromo-3,3-dimethyl-2-butanone
3-Bromo-3-methyl-2-butanone
1,1,1-Trifluoro-2-butanone
4-Chloro-2-butanone
(S)-3-(Boc-amino)-1-chloro-2-butanone
4-hydroxy-3,3-dimethyl-2-Butanone
1-Bromo-2-butanone
