3-chloroisochromen-1-one

(8ci,9ci)-1H-2-苯并吡喃-1,3,4-三酮

(Z)-3-氰基丁-2-烯酸乙酯

ethyl (E)-3-cyanobut-2-enoate

1-nitro-2,3,5,6-tetrahydro-1H-imidazo[1,2-a]imidazole