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. Author manuscript; available in PMC: 2016 Apr 6.
Published in final edited form as: J Am Chem Soc. 2015 Oct 12;137(41):13220–13223. doi: 10.1021/jacs.5b06841

Figure 3.

Figure 3

The molecular structures of 4 (top) and 5 (bottom) with thermal ellipsoids shown at 50% probability. The hydrogen atoms (except for the formyl H), isopropyl groups, and sodium cryptand counterion have been omitted for clarity.