2-甲基-6-硝基-咪唑并[1,2-A]吡啶-3-羧酸乙酯

ethyl 7-bromo-3-methyl-4H-1,4-benzothiazine-2-carboxylate

ethyl 2-(4-chlorophenoxy)-2-methyl-3-oxobutanoate

4-甲基-2-氧代-2,3-二氢-1H-咪唑-5-羧酸乙酯

ethyl 5,6-dihydroxy-2-methyl-1-benzofuran-3-carboxylate