title: 1-(5-Hy-droxy-2,2,8,8-tetra-methyl-2H,8H-pyrano[2,3-f]chromen-6-yl)ethanone.
abstract: In the title compound, C(18)H(20)O(4),the pyran ring of the chromene unit adopts a half-chair conformation. An intra-molecular O-H⋯O hydrogen bond occurs. In the crystal, mol-ecules are linked along the b axis by C-H⋯O hydrogen bonds.
authors.affiliation: School of Chemistry and Physics, University of KwaZulu-Natal, Private Bag X54001, Durban 4000,  South Africa.
authors.forename: Sunayna
authors.initials: S
authors.lastname: Pawar
authors.forename: Adele
authors.initials: A
authors.lastname: Cheddie
authors.forename: Bernard
authors.initials: B
authors.lastname: Omondi
authors.forename: Neil Anthony
authors.initials: NA
authors.lastname: Koorbanally