2-hydroxy-3,6-dimethoxybenzaldehyde

5-bromo-3-methoxybenzene-1,2-diol

4-methoxy-9H-xanthene

1,2,5-三甲氧基-3-甲基苯

2-chloro-6-methoxycyclohexa-2,5-diene-1,4-dione