title: 2-Meth-oxy-3-[(3,4,5-trimethoxy-anilino)methyl-idene]-3,4-dihydro-2H-1-benzopyran-4-one.
abstract: The title mol-ecule, C(20)H(21)NO(6), adopts a keto-amine tautomeric form. An intra-molecular N-H⋯O hydrogen bond, classified as a resonanse-assisted hydrogen bond, influences the mol-ecular conformation; the two benzene rings form a dihedral angle of 24.6 (1)°. In the crystal structure, weak inter-molecular C-H⋯O hydrogen bonds link mol-ecules into chains propagating along [001].
authors.forename: Magdalena
authors.initials: M
authors.lastname: Małecka
authors.forename: Michał
authors.initials: M
authors.lastname: Ciołkowski
authors.forename: Elżbieta
authors.initials: E
authors.lastname: Budzisz