Fig. 2.

A view of the O—H···O, N—H···O and C—H···O interactions (dotted lines) in the crystal structure of the title compound. [Symmetry codes: (i) x,y - 1, z; (ii) x, y + 1, z; (iii) x,y + 1, z - 1; (iv) x, y, z - 1.]