electronic reprint Acta Crystallographica Section C Crystal Structure Communications ISSN 0108-2701 Editor: George Ferguson Hydrogen-bonding and C—H interactions in 7-hydroxy-3-methoxy-4- methyl-5,6,7,8-tetrahydropyrido[1,2-c]pyrimidin-1(9H)-one Mario Cetina, Ante Nagl, Svjetlana Prekupec, Silvana Rai´ c-Mali´ c and Mladen Mintas 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. (2005). C61, o158–o160 Cetina et al. C 10 H 14 N 2 O 3