“…A search of Cambridge Structural Database (CSD version 5.37; last update May 2016; Groom et al, 2016) yielded four hits for 7H-[1] benzofuran[2,3-b]carbazole and 47 hits for 9-(phenylsulfonyl)-9H-carbazole. However, the compound 7phenylsulfonyl-7H-benzofuran[2,3-b]carbazole (EYOFEE01; Panchatcharam et al, 2011), which crystallizes in P2 1 /c is the closest analogue of compound (I). The compound 2-methyl-9-(phenylsulfonyl)-9H-thieno[2,3-b]carbazole (IQOBIA; Sureshbabu et al, 2011), which crystallizes in space group P2 1 / c, is the closest analogue of compound (II).…”