5H-[1]Benzopyrano[4,3-b]pyridine-3-carboxylic acid, 2-methyl-5-oxo-, methyl ester (en)

乙酰乙酸仲丁酯

methyl 3-(trifluoromethylsulfonyloxy)but-2-enoate

2-diazonio-1-[(2-methylpropan-2-yl)oxy]-3-oxobut-1-en-1-olate

3-氧代十六烷酸甲酯