Fig. 1

Chemical structures of (E)-1-(3,4-dimethoxyphenyl)but-3-en-1-ol (compound D) (A), (E)-1-(3,4-dimethoxyphenyl)but-3-en-1-yl acetate (compound D acetate) (B), and (E)-(3,4-dimethoxyphenyl)butadiene (DMPBD) (C)