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. Author manuscript; available in PMC: 2016 May 27.
Published in final edited form as: J Am Chem Soc. 2015 May 14;137(20):6484–6487. doi: 10.1021/jacs.5b03382

Figure 3.

Figure 3

a) Structures of pentamers 2a-b. b) Crystal structures of pentamers 2a and 2b, depicting the inserted EtOH molecule of 2b in black. 12-Atom H-bonds are shown as red dashes, and 10-atom H-bonds as blue dashes.