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. Author manuscript; available in PMC: 2010 Mar 25.
Published in final edited form as: J Am Chem Soc. 2009 Mar 25;131(11):3834–3835. doi: 10.1021/ja810029b

Figure 2.

Figure 2

NMR spectra (acetone-d6) of fractions, of which retention time corresponded to 6. Synthetic compound (a) and the fractions prepared from the culture incubated for four (b), five (c), and six (d) days. The red arrows show the signals for 6.