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. Author manuscript; available in PMC: 2010 Dec 7.
Published in final edited form as: J Org Chem. 2009 Dec 4;74(23):8997–9009. doi: 10.1021/jo901641k

FIGURE 3.

FIGURE 3

1H-1H-ROESY spectra (DMSO-d6, 600 MHz) of compounds 15 and 16. A) Compound 15: Through-space correlation between H2 and H6. B) Compound 16: Through-space correlation between H2 and H3.