Abstract

In the title compound, C19H17NO4S, the phenyl ring and the naphthalene ring system are oriented at a dihedral angle of 4.12 (2)° and the mol­ecule adopts a U-shaped conformation. The Cc—C—N—S (c = carb­oxy) torsion angle is 90.98 (15)°. In the crystal, mol­ecules are linked by O—H⋯O and N—H⋯O hydrogen bonds, resulting in (100) chains incorporating centrosymmetric R 2 2(14) and R 2 2(10) loops. Weak aromatic π–π stacking is also observed [centroid–centroid separations = 3.963 (2) and 3.932 (2) Å].

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