title: 2,3,4,6-Tetra-O-acetyl-β-d-galacto-pyrano-syl butyrate.
abstract: The title compound, C(18)H(26)O(11), was synthesized by a condensation reaction of 2,3,4,6-tetra-O-acetyl-α-d-galactopyranosyl bromide and butyric acid. The acet-oxy-methyl and butyrate groups are located on the same side of the pyran ring, showing the β configuration for the d-glycosyl ester; the butyl group adopts an extend conformation, the C-C-C-C torsion angle being 179.1 (7)°. In the crystal, the mol-ecules are linked by weak C-H⋯O hydrogen bonds.
authors.forename: Yan-Li
authors.initials: YL
authors.lastname: Cui
authors.forename: Ming-Han
authors.initials: MH
authors.lastname: Xu
authors.forename: Jian-Wei
authors.initials: JW
authors.lastname: Mao
authors.forename: Yong-Ping
authors.initials: YP
authors.lastname: Yu