1-Methyl-2-methyl­sulfanyl-6-nitro-1H-benzimidazole

The mol­ecule of the title compound, C₉H₉N₃O₂S, is built up from fused five- and six-membered rings connected to methyl­sulfanyl and nitro groups, respectively. The mean plane through the fused ring system is inclined slightly relative to the plane passing through the nitro group [dihedral angle = 3.6 (2)°]. In the crystal, mol­ecules are linked by C—H...O hydrogen bonds and π–π inter­actions between imidazole rings [inter-centroid distance = 3.667 (3) Å], forming a three-dimensional network.

Crystal structure of 3-{1-[(1-allyl-1H-indazol-6-yl)amino]­ethyl­idene}-6-methyl-2H-pyran-2,4(3H)-dione

In the title compound, C₁₈H₁₇N₃O₃, the dihedral angle between the planes of the indazole ring system [maximum deviation = 0.012 (1) Å] and the pyran-2,4-dione ring is 54.03 (6)°. An intra­molecular N—H...O hydrogen bond closes an S(6) ring. The same H atom also participates in an inter­molecular N—H...O hydrogen bond, which generates an inversion dimer. The dimers are linked by weak C—H...O contacts, thereby forming a three-dimensional network.