"3,4-Dimethoxystyrene" . "4-Vinyl-1,2-dimethoxybenzene" . . "4-Ethenyl-1,2-dimethoxybenzene" . . "4-Vinylveratrole" . "1,2-Dimethoxy-4-vinylbenzene" . . . . . . . . . . . "3,4-Dimethoxystyrene" .