Purine 3′:5′-cyclic nucleotides with the nucleobase in a syn orientation: cAMP, cGMP and cIMP

Ślepokura, K.A.

doi:10.1107/S2053229616006999

Acta Crystallographica Section C
Acta Crystallographica
Section C STRUCTURAL CHEMISTRY

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Figure 9
(a) Superposition of the nucleotide ribbons present in (III) (transparent) and (IV), formed by Gua–phosphate hydrogen bonds [dashed lines; atoms for (IV) are labelled], and the crystal packing scheme in (b) (III) and (c) (IV). Hydrogen-bonded water molecules in (III) and the Na(H₂O)₆ polyhedra in (IV) are also shown. Disorder of atom O3W in (IV) has been omitted. [Symmetry code: (ii) −x + $[{1\over 2}]$ , −y + 1, z + $[{1\over 2}]$ .]

STRUCTURAL
CHEMISTRY

ISSN: 2053-2296

Volume 72| Part 6| June 2016| Pages 465-479

doi:10.1107/S2053229616006999

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