(2S)-2-methyl-5-oxo-5-(2-oxo(1,3-oxazolidin-3-yl))pentanoic acid

5-((S)-5-methoxy-5-oxopentan-2-yl) 1-methyl (S)-2-methylpentanedioate

1-[(5S)-2-呋喃-3-基-5-甲基-1-环戊烯基]-3-甲基丁-2-烯-1-酮

3-甲基四氢吡喃-2,6-二酮

(S)-(+)-2-甲基戊二酸二甲酯