Chemical structure modified by
Behling, L. A., Hartsel, S.C., Lewis, D.E., DiSpirito, A.A., Choi, D.W., Masterson, L.R., Veglia, G., and Gallagher, W.H. (2008). "NMR, mass spectrometry and chemical evidence reveal a different chemical structure for methanobactin that contains oxazolone rings." J Am Chem Soc 130, 12604-5.