ethyl 5-chloro-2-(2-ethoxy-2-oxoethoxy)benzoate

ethyl 2-(2,4-dioxo-3,1-benzoxazin-1-yl)acetate

bromozinc(1+),ethyl acetate

环戊-1-烯-1-乙酸乙酯

ethyl 3-diethoxyphosphoryl-4-oxopentanoate