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. Author manuscript; available in PMC: 2018 Jan 24.
Published in final edited form as: Angew Chem Int Ed Engl. 2016 Dec 27;56(5):1390–1395. doi: 10.1002/anie.201608752

Figure 1.

Figure 1

Top: Crystal structures of the minor (left) and the major (right) diastereomer of 3dc. Bottom: Proposed formation of the only observed two stereoisomers.