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. Author manuscript; available in PMC: 2013 Oct 19.
Published in final edited form as: J Org Chem. 2012 Oct 11;77(20):8905–8912. doi: 10.1021/jo3011655

Figure 2.

Figure 2

Newman projections about C1-C2 showing alternative modes of attack on the 4,6-O-benzyidene-protected mannosyl and glucosyl oxocarbenium ions, indicating torsional interactions present in the disfavored modes.