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Figure 9
The two-layered hydrogen-bonded polymeric structure of (IV)[link], based on a cyclic hetero­tetra­meric core. (For symmetry codes, see Table 5[link].)

Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296
Volume 72| Part 2| February 2016| Pages 105-111
doi:10.1107/S2053229615024821
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