Crystal structure of ethyl 5-[3-(di­methyl­amino)­acrylo­yl]-2-{[(di­methyl­amino)­methyl­idene]­amino}-4-methylthio­phene-3-carb­oxy­late

In the title compound, C(16)H(23)N(3)O(3)S, the dihedral angles between the thio­phene ring and the almost planar di­methyl­amino-methyl­ene­amino (r.m.s. deviation = 0.005 Å) and di­methyl­amino-acryloyl (r.m.s. deviation = 0.033 Å) substituents are 6.99 (8) and 6.69 (7)°, respectively. The ester CO(2) group subtends a dihedral angle of 44.92 (18)° with the thio­phene ring. An intra­molecular C—H⋯O hydrogen bond generates an S(6) ring. In the crystal, inversion dimers linked by pairs of C—H⋯O hydrogen bonds generate R (2) (2)(14) loops. In addition, a weak C—H⋯π inter­action is observed.