Acta Cryst. (2013). E69, o513
[ doi:10.1107/S1600536813006119 ]
Abstract: In the title compound, C16H11NO4, the dihedral angle between the ten-membered chromen-4-one ring system (r.m.s. deviation = 0.0095 Å) and the benzene ring is 86.16 (5)°. In the crystal, molecules are linked into a three-dimensional network by weak C-HO hydrogen bonds. The crystal studied was a non-merohedral twin, with the minor twin component refining to 0.093 (1).
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