ethyl imidazo [1,2-a]pyrazine-2-acetate

ethyl 7-methyl-5H-pyrrolo[2,3-b]pyrazine-6-carboxylate

6-chloro-2-(chloromethyl)pyrido[1,2-a]pyrimidin-4-one

2,4-二氯-3-氧代丁酸乙酯

5-(chloromethyl)-1-phenylpyrazolo[1,5-a]pyrimidin-7-one