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. Author manuscript; available in PMC: 2014 Mar 20.
Published in final edited form as: J Am Chem Soc. 2013 Mar 7;135(11):4171–4174. doi: 10.1021/ja311065v

Figure 1.

Figure 1

(a) Structures of cyanosporasides A–F (1–6); (b) Proposed enediyne origin and abiotic cycloaromatization via a diradical intermediate to yield cyanosporasides;4b,5 (c) Key NOESY correlations for determination of the relative stereochemistry of the pyranohexose unit in 6.