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. Author manuscript; available in PMC: 2012 Apr 6.
Published in final edited form as: J Am Chem Soc. 2011 Jan 19;133(6):1971–1977. doi: 10.1021/ja109226s

Figure 2.

Figure 2

Mosher's ester analysis of the polyol 5. (A) ΔδS-R of 1H for S- and R-bis-MTPA esters of 5, and (B) rotation model for determination of relative configurations for C-19 and C-20