N-(X-Methylphenyl)-2-{(Z)-[(2,3,4-trimethoxyphenyl)methylidene]amino}-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxamide, where X = 2 and 3.

The title isomers, viz. the N-(3-methylphenyl)-, (I), and N-(2-methylphenyl)-, (II), derivatives, both C(26)H(28)N(2)O(4)S, adopt an E configuration that places the thiophene and trimethoxyphenyl groups on opposite sides of the C=N double bond, providing a suitable orientation for formation of an intramolecular N-H..