ethyl 4,4-dimethyl-3-sulfanylpent-2-enoate

3-(2,2-dimethylpropanoyl)chromen-2-one

2,4,4-trimethyl-3-oxopentanoic acid

4,4-dimethyl-1,3-pentanediol

3-羟基-4,4-二甲基戊酸甲酯