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. Author manuscript; available in PMC: 2018 Mar 4.
Published in final edited form as: J Am Chem Soc. 2017 Nov 8;139(46):16450–16453. doi: 10.1021/jacs.7b08985

Figure 2.

Figure 2

Selected 13C NMR spectra of herbicidin A isolated from cultures of Streptomyces sp. L-9-10 fed with (A) no additive, (B) sodium [2-13C]acetate, and (C) [U-13C, 15N]isoleucine. Carbon signals from 2b are labeled with their numberings.