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Acta Cryst. (2013). C69, 162-171  [ doi:10.1107/S0108270112051049 ]

Six closely related 4,6-disubstituted 2-amino-5-formyl­pyrimidines: different ring conformations, polarized electronic structures, and hydrogen-bonded assembly in zero, one, two and three dimensions

L. M. Acosta, A. F. Yepes, A. Palma, J. Cobo and C. Glidewell

Formula: C16H19N5O3, C14H16N6O2, C17H21N5O3, C18H23N5O3 and C15H23N5O3

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