



Acta Cryst. (1997). B53, 521-533 [doi:10.1107/S0108768196014048]
Synopsis: The cage tetra-annular HMTA (CH2)6N4 forms hydrogen- bonded adducts giving chain or double-helix topologies with bisphenols and triple-helix or chain-of-rings topology with trisphenols.
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