The mol-ecule of the title compound, CHNO, was prepared by [3 + 2] 1,3-dipolar cyclo-addition of 4--octyl-phenyl-nitrile oxide and 4--but-oxy-styrene, the latter compound being a very useful inter-mediate to the synthesis of liquid-crystalline materials. In the mol-ecule, the benzene rings of the -octyloxyphenyl and -but-oxy-phenyl groups form dihedral angles of 2.83 (7) and 85.49 (3)°, respectively, with the mean plane of the isoxazoline ring. In the crystal, mol-ecules are linked by weak C-H⋯O hydrogen inter-actions into chains running parallel to the axis.
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