2-(4-nitrobenzoyloxy)benzoylmethyltriphenylphosphonium bromide

(2-acetylphenyl) 4-nitrobenzoate

3-(methoxycarbonyl)-2-(4-nitrophenyl)-4H-benzopyran-4-one

2-(4-nitrophenyl)-2,3-dihydrochromen-4-one

2'-羟基苯乙酮