Diethyl (2-acetoxy-3,4,5,6-tetrachlorophenyl)maleate

ethyl 2-oxobenzo[h]chromene-4-carboxylate

ethyl 2-(2-oxobenzo[g][1]benzofuran-3-ylidene)acetate

乙基4-羟基-2-苯基喹啉-3-羧酸酯

2-((triphenylphosphoranylidene)amino)benzonitrile