6-氯-1H-吡啶并[3,2-d]嘧啶-2,4-二酮

6-iodo-8-methyl-1H-3,1-benzoxazine-2,4-dione

6-(4-氟苯基)吡啶并[3,2-d]嘧啶-2,4-二醇

8-chloro-7-(4-methylphenyl)-2H-[1,2,4]triazolo[4,3-a]pyridin-3-one

8-bromo-7-chloro-2H-[1,2,4]triazolo[4,3-a]pyridin-3-one