carboxy-8 ethoxycarbonyl-2 naphto[2,1-b:7,6-b']difuranne

2,3-二氢-2,3-二氧代-1H-吲哚-1-乙酸乙酯

5-[(4-nitrophenyl)methylidene]-2-phenyl-1H-imidazol-4-one

2-(4-cyano-3-fluorophenoxy)acetic acid

2-(2,6-dichloro-4-fluorophenoxy)acetic acid