4-chloro-1,1-dimethoxy-3-methylbut-2-ene

acetic acid,4-methoxy-2-methylbuta-1,3-dien-1-ol

2,5-dimethoxy-3-methyl-2,5-dihydrofuran

2-methylbut-2-ene-1,4-dial

4,4-dimethoxy-3-methylbut-2-enal