Si‐Shun Kang

Ethyl 5-formyl-2,4-dimethyl-1H-pyrrole-3-carboxyl-ate.

The molecule of the title compound, C10H13NO3, is approximately planar. A network of N—H⋯O and weak C—H⋯O hydrogen bonds helps to consolidate the crystal structure.

2-[3,4-Dibut­oxy-5-(5-phenyl-1,3,4-oxadiazol-2-yl)-2-thien­yl]-5-phenyl-1,3,4-oxadiazole

In the title compound, C28H28N4O4S, the dihedral angles between the central thiophene ring and its pendant oxadiazole rings are 1.2 (3) and 9.8 (3)°. The dihedral angles between the oxadiazole and phenyl rings are 2.9 (3) and 1.8 (3)°. Some short intramolecular C—H⋯O contacts occur.

3-(2-Bromo-4,5-dimethoxy-phen-yl)propiononitrile.

In the molecule of the title compound, C11H12BrNO2, a weak intramolecular C—H⋯Br hydrogen bond results in the formation of a five-membered ring, which adopts an envelope conformation with the H atom displaced by 0.486 Å from the plane of the other ring atoms. In the crystal structure, intermolecular C—H⋯O hydrogen bonds link the molecules.