title: 1-[4-(2,3,4,6-Tetra-O-acetyl-β-d-allo-pyranos-yloxy)benzyl-idene]thio-semi-carbazide.
abstract: The title compound, C(22)H(27)N(3)O(10)S, was synthesized by reaction of an ethanol solution of helicid (systematic name: 4-formylphenl-β-d-allopyranoside), thio-semicarbazide and acetic acid. The mol-ecule exhibits a trans conformation with respect to the C=N double bond. The pyran ring adopts a chair conformation. In the crystal structure, the mol-ecules are linked into chains parallel to the b axis by inter-molecular N-H⋯O hydrogen bonds.
authors.affiliation: College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China.
authors.forename: Li
authors.initials: L
authors.lastname: Fu
authors.forename: Xiu-Juan
authors.initials: XJ
authors.lastname: Yin
authors.forename: Lei
authors.initials: L
authors.lastname: Zheng
authors.forename: Ying
authors.initials: Y
authors.lastname: Li
authors.forename: Shu-Fan
authors.initials: SF
authors.lastname: Yin