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Acta Crystallogr Sect E Struct Rep Online. 2012 Nov 1;68(Pt 11):o3139. doi: 10.1107/S1600536812042559. Epub 2012 Oct 20.


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Wenzhou Medical College, School of Pharmacy, Wenzhou 325035, People's Republic of China.


The title compound, C(13)H(11)N(3)O(3)S, was synthesized from 1H-1,2,4-triazole-5-thiol in a one pot reaction. The fused thia-zolo[3,2-b][1,2,4]triazole system is essentially coplanar with the benzene ring: they enclose an inter-planar angle of 1.37 (13)°. The olefinic double bond is in a Z conformation. In the crystal, C-H⋯N hydrogen bonds link the mol-ecules into double layers parallel to the ab plane.

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