title: 4-[(Hy-droxy)(4-methyl-phen-yl)methyl-idene]isochroman-1,3-dione.
abstract: In the title compound, C(17)H(12)O(4), the six-membered heterocyclic ring adopts a distorted screw-boat conformation. The mol-ecular structure exhibits an S(6) ring motif, owing to an intra-molecular O-H⋯O hydrogen bond. In the crystal, weak C-H⋯O contacts generate an infinite chain along the c axis. There are also π-π stacking inter-actions between neighbouring isochromanedione benzene rings, with a centroid-centroid distance of 3.755 (1) Å, and C-O⋯π inter-actions with an O⋯centroid distance of 3.964 (2) Å.
authors.forename: Akoun
authors.initials: A
authors.lastname: Abou
authors.forename: Abdoulaye
authors.initials: A
authors.lastname: Djandé
authors.forename: Adama
authors.initials: A
authors.lastname: Saba
authors.forename: Thierry
authors.initials: T
authors.lastname: Chiavassa
authors.forename: Rita
authors.initials: R
authors.lastname: Kakou-Yao