4-(2-Hydroxy­benzyl­idene)-3-methyl­isoxazol-5(4H)-one

The mol­ecular skeleton of the title mol­ecule, C11H9NO3, is approximately planar (r.m.s. deviation = 0.0056 Å); the two rings form a dihedral angle of 6.5 (1)°. In the crystal structure, inter­molecular O—H⋯N hydrogen bonds involving the H atom of the hydr­oxy group and the N atom of the isoxazole ring link mol­ecules into chains running along the c axis