吡咯并[1,2-a]喹喔啉-4(5H)-酮

N,N-二(1-萘基)尿素

5-pyridin-2-yl-3H-1,3,4-oxadiazol-2-one

1,3-bis(2,4,6-trimethylphenyl)urea

5-pyridin-3-yl-3H-1,3,4-oxadiazol-2-one