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. 2023 Apr 6;123(8):4602–4634. doi: 10.1021/acs.chemrev.2c00667

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© 2023 The Authors. Published by American Chemical Society

Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).

PMC Copyright notice

(a) Structural formula of bicapped cage 13. Reproduced with permission from ref (85). Copyright 1987 American Chemical Society. (b) Structural formula of trefoil knot 14. Reproduced with permission from ref (86). Copyright 2000 Wiley-VCH.