title: (S)-2-[(2-Hy-droxy-benz-yl)aza-nium-yl]-4-(methyl-sulfan-yl)butano-ate.
abstract: The zwitterionic title compound, C(12)H(17)NO(3)S, is a reduced Schiff base derived from (S)-N-(2-hy-droxy-benzyl-idene)methio-nine. An intra-molecular inter-action between the N-H and carboxyl-ate groups forms a roughly planar (r.m.s. deviation = 0.1405 Å) five-membered ring containing the H(N), N, Cα, C(carboxyl-ate) and O atoms in a penta-gonal conformation. In the crystal, a supra-molecular triangle-shaped motif is generated by mol-ecules held together by O-H⋯O and N-H⋯O hydrogen bonds.
authors.forename: Giovanna
authors.initials: G
authors.lastname: Brancatelli
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Bruno
authors.forename: Francesco
authors.initials: F
authors.lastname: Nicoló
authors.forename: Loredana
authors.initials: L
authors.lastname: Canfora
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Ruisi