[1,1'-Biphenyl]-4-carboxylic acid, 2-nitro-

ethyl 9H-carbazole-2-carboxylate

1-(9-acetylcarbazol-2-yl)-2-chloroethanone

9-乙酰基咔唑

1-(9H-carbazol-2-yl)-2-chloroethanone