4-acetyl-5-anilinothiophene-2,3-dione

3-phenyl-5-(triphenyl-λ⁵-phosphanylidene)cyclopent-3-ene-1,2-dione

4-(2-fluoro-4-pentylphenyl)benzoic acid

5-氯吡嗪-2-甲酰氯

3-Chloro-5-fluorobenzoyl chloride