3,5-二溴水杨醛

6-溴-2-氧代-2H-1-苯并吡喃-3-羧酸氯

4-bromo-6-[(2-hydroxyethylamino)methylidene]cyclohexa-2,4-dien-1-one

2-hydroxy-5-thiophen-2-ylbenzaldehyde

Ethyl 5-bromo-2,3-dihydro-1-benzofuran-2-carboxylate