DL-3-甲基-Γ-丁内酯

2,6-dimethyl-4-oxo-heptanedioic acid

2-甲基-1,4-丁二醇

2-methyl-2-prop-1-ynylpropanedioic acid

6-甲基环己-1,3-二烯-1-甲醛