title: Diethyl 3H-naphtho[2,1-b]pyran-2,3-dicarboxyl-ate.
abstract: The sp(3)-hybridized methine C atom in the title compound, C(19)H(18)O(5), lies out of the mean plane of the remaining 13 atoms of the naphthopyran fused-ring system by 0.571 (1) Å, and its H atom occupies a pseudo-equatorial site.
authors.forename: Abdullah Mohamed
authors.initials: AM
authors.lastname: Asiri
authors.forename: Seik Weng
authors.initials: SW
authors.lastname: Ng