Acta Cryst. (2012). C68, o12-o18  [ doi:10.1107/S0108270111050207 ]

Hydrogen-bonded assembly in six closely related pyrazolo[3,4-b]pyridine derivatives; a simple chain, three types of chains of rings and a complex sheet structure

J. Quiroga, Y. Díaz, J. Cobo and C. Glidewell

Formula: C₂₀H₁₄ClN₃O, C₂₁H₁₆ClN₃O, C₂₀H₁₃Cl₂N₃O, C₂₀H₁₃BrClN₃O, C₂₁H₁₆ClN₃O₂ and C₂₀H₁₃ClN₄O₃

Online 6 December 2011

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