title: 4-(Methyl-sulfan-yl)-2-(p-toluene-sulfonamido)butanoic acid.
abstract: In the title compound, C(12)H(17)NO(4)S(2), the carboxyl groups link the mol-ecules into centrosymmetric dimers through O-H⋯O hydrogen bonds. An N-H⋯O hydrogen bond between the NH group of the l-methio-nine unit and a neighbouring carboxyl group, together with a complementary C-H⋯O contact to one O atom of the sulfonyl group, link the dimers into one-dimensional chains along the crystallographic b axis.
authors.affiliation: Key Laboratory of Non-ferrous Metal Materials and Processing Technology, Department of Materials and Chemical Engineering, Ministry of Education, Guilin University of Technology, Guilin 541004, People's Republic of China.
authors.forename: Li
authors.initials: L
authors.lastname: Wang
authors.forename: Zheng
authors.initials: Z
authors.lastname: Liu
authors.forename: Yong Liao
authors.initials: YL
authors.lastname: Wang