Experimental

R factor = 0.051; wR factor = 0.115; data-to-parameter ratio = 15.1. In the title molecule, C20H15N3, the atoms in the carbazole unit deviate from planarity [maximum deviation from mean plane = 0.1082 (15) Å]. The pyrrole ring makes dihedral angles of 3.17 (8)/4.10 (9), 7.20 (9) and 44.62 (9) with the fused benzene, pyrazole and phenyl rings, respectively. In the crystal, molecules are linked via N—H N hydrogen bonds, forming an infinite chain along [010]. Molecules are further linked by nine – [centroid–centroid distances vary from 3.6864 (11) to 3.9802 (11) Å] and one C—H interaction, forming a three-dimensional network. Related literature For related structures and the biological and pharmacological activity of carbazole alkaloids, see: Archana et al. (2010, 2011)