5-methyl-2-(3-methyl-4-nitrophenyl)-1H-pyrazol-3-one

methyl 2-(3-formyl-1H-indol-2-yl)acetate

2-乙酰基-3,5-二甲氧基苯乙酸甲酯

ethyl (2Z)-3-oxo-2-(pyridin-2-ylmethylidene)butanoate

methyl (3E)-3-[(6-chloropyridazin-3-yl)hydrazinylidene]butanoate