O-(5-oxocyclopenten-1-yl) N,N-dimethylcarbamothioate

2,3-二氢-1H-环戊并[b]喹噁啉

bis(5-oxocyclopenten-1-yl) carbonate

2,3,4,5,6,7-hexahydro-1H-cyclopenta[b]azepin-8-one

2,3,6,7-Tetrahydrocyclopentazepin-8(1H)-on