Acta Cryst. (2013). E69, o1804-o1805
[ doi:10.1107/S1600536813031395 ]
Abstract: In the title compound, C21H16BrNO3, the mean planes of the anthracene tricycle and isoxazole ring are inclined to each other at a dihedral angle of 72.12 (7)°. The carboxy group is slightly out of the isoxazole mean plane, with a maximum deviation of 0.070 (5) Å for the carbonyl O atom. In the crystal, pairs of weak C-HO hydrogen bonds link the molecules into dimers, and weak C-HN interactions further link these dimers into corrugated layers parallel to the bc plane.
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