(E)-N′-[5-Chloro-3-meth­oxy-2-(4-methyl­phenyl­sulfon­yloxy)benzyl­idene]isonicotinohydrazide acetic acid solvate: hydrogen-bonded network of alternating R⁴₄(42), R⁵₅(33) and R⁶₆(40) rings

In the title compound, C₂₁H₁₈ClN₃O₅S·C₂H₄O₂, a combination of O—H...O, N—H...O, C—H...O and C—H...N hydrogen bonds links the components into a complex network containing alternating R₄⁴(42), R₅⁵(33) and R₆⁶(40) rings.