electronic reprint Acta Crystallographica Section C Crystal Structure Communications ISSN 0108-2701 Di-2-pyridyl ketone N 4 ,N 4 -(butane-1,4-diyl)thiosemicarbazone Anwar Usman, Ibrahim Abdul Razak, Suchada Chantrapromma, Hoong-Kun Fun, Varughese Philip, A. Sreekanth and M. R. Prathapachandra Kurup Copyright © International Union of Crystallography Author(s) of this paper may load this reprint on their own web site provided that this cover page is retained. Republication of this article or its storage in electronic databases or the like is not permitted without prior permission in writing from the IUCr. Acta Cryst. (2002). C58, o652–o654 Anwar Usman et al. C 16 H 17 N 5 S