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. 2019 Jan 14;9(4):1759–1771. doi: 10.1039/c8ra09792e

Fig. 3. (a) Structures of diazaquinomycin J (2) and proposed anteiso and propyl-methyl isomers. (b) LC-MS chromatogram of isomeric mixture of 2; (c) LC-MS chromatogram of pure synthetic 2; (d) zoomed 1H NMR spectrum of isomeric mixture of 2; (e) zoomed 1H NMR spectrum of pure synthetic 2; (f) zoomed 13C NMR spectrum of isomeric mixture of 2; (g) zoomed 13C NMR spectrum of pure synthetic 2. For clarity, LC-MS analyses shown in (b) and (c) were recorded with MS detector set to monitor m/z = 397 ± 2.

Fig. 3