Description:
<jats:p>In the title pyrazoline derivative, C<jats:sub>16</jats:sub>H<jats:sub>16</jats:sub>N<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>·H<jats:sub>2</jats:sub>O, the pyrazoline ring has an envelope conformation with the substituted<jats:italic>sp</jats:italic><jats:sup>2</jats:sup>C atom on the flap. The pyrazoline ring makes angles of 86.73 (12) and 13.44 (12)° with the trisubstituted and disubstituted benzene rings, respectively. In the crystal structure, the molecules are connected into chains running in the<jats:italic>b</jats:italic>-axis direction by O—H...N hydrogen bonding. Parallel chains interact through N—H...O hydrogen bonds and π–π stacking of the trisubstituted phenyl rings. The major contribution to the surface contacts are H...H contacts (44.3%) as concluded from a Hirshfeld surface analysis.</jats:p>