Abstract
The title compound, C
25
H
29
NO
3
, is a Schiff base derivative of coumarin 120. There are two structurally similar but crystallographically independent molecules in the asymmetric unit. Both molecules exist in
E
configurations with respect to the C=N double bonds. The dihedral angles between the coumarin and 3,5-di-
tert
-butyl-2-hydroxybenzylidene ring planes are 4.62 (7) and 14.62 (7)° for the two molecules. Intramolecular O—H⋯N hydrogen bonding involving the O—H groups and the azomethine N atoms generate
S
(6) rings. In the crystal structure, independent molecules are linked by C—H⋯π interactions, with groups of four molecules stacked along the
c
axis.