(E)-1-(2-Thien­yl)-3-(3,4,5-trimethoxy­phen­yl)prop-2-en-1-one

The mol­ecule of the title heteroaryl chalcone, C(16)H(16)O(4)S, which consists of substituted thio­phene and benzene rings bridged by the prop-2-en-1-one group, is slightly twisted. The dihedral angle between the thio­phene and 3,4,5-trimethoxy­phenyl rings is 12.18 (4)°. The three meth­oxy groups have two different conformations; two meth­oxy groups are coplanar [C—O—C—C torsion angles = −1.38 (12) and 0.47 (12)°] whereas the third is (-)-synclinal with the benzene ring. In the crystal structure, adjacent mol­ecules are linked in a face-to-side manner into chains along the c axis by weak C—H⋯O(enone) inter­actions. These chains are stacked along the b axis by weak C—H⋯O(meth­oxy) inter­actions.