Atomic coordinates and structure factors for the reported crystal structures have been deposited in the Cambridge Crystallographic Data Centre under the accession codes CCDC-1400635 (for 2), CCDC-1400636 (for 3) and CCDC-1458636 (for 5). All other data that support the findings of this study are available within Supplementary Information files, and are also available from the corresponding author on reasonable request.
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