The crystal structure determination of the title compound, C16H17NO5,
establishes the relative stereochemistry, The molecule contains a fura
nyl ring with a twist conformation fused to an unsaturated six-membere
d ring with a twist-chair conformation, There are weak intermolecular
C-H ... O interactions, with distances C ... O(1 - x, 1/2 + y, 1/2 - z
) 3.254 (2) and H ... O(1 - x, 1/2 + y, 1/2 - z) 2.41 Angstrom.