title: 2-(6,7-Dimethyl-3-methyl-sulfanyl-1-benzofuran-2-yl)acetic acid.
abstract: In the title compound, C(13)H(14)O(3)S, the methyl group of the methyl-sulfanyl substituent is almost perpendicular to the plane of the benzofuran fragment [80.5 (9)°]. The carboxylic acid groups are involved in inter-molecular O-H⋯O hydrogen bonds, which link the mol-ecules into centrosymmetric dimers. These dimers are further packed into stacks along the a axis by C-H⋯π inter-actions.
authors.forename: Hong Dae
authors.initials: HD
authors.lastname: Choi
authors.forename: Pil Ja
authors.initials: PJ
authors.lastname: Seo
authors.forename: Byeng Wha
authors.initials: BW
authors.lastname: Son
authors.forename: Uk
authors.initials: U
authors.lastname: Lee