title: 2-(Naphthalene-2-sulfonamido)-3-phenyl-propanoic acid.
abstract: In the title compound, C(19)H(17)NO(4)S, the phenyl ring and the naphthalene ring system are oriented at a dihedral angle of 4.12 (2)° and the mol-ecule adopts a U-shaped conformation. The C(c)-C-N-S (c = carb-oxy) torsion angle is 90.98 (15)°. In the crystal, mol-ecules 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].
authors: Department of Chemistry, Materials Chemistry Laboratory, GC University, Lahore 54000,  Pakistan.
authors: Hafiz
authors: H
authors: Mubashar-Ur-Rehman
authors: Muhammad Nadeem
authors: MN
authors: Arshad
authors: Abdullah M
authors: AM
authors: Asiri
authors: Islam Ullah
authors: IU
authors: Khan
authors: Muhammad
authors: M
authors: Bilal