2,5-二羟基-1,4-苯二羧醛

1,4-dimethoxy-2,5-dimethylbenzene

2,5-二甲氧基苯-1,4-二甲醛

2,5-dimethoxy-4-(hydroxymethyl)benzaldehyde

1,4-bis(bromomethyl)-2,5-dimethoxybenzene