1H and 13C NMR spectral studies of some 4H-3,1-benzoxazin-4-ones and their 2-acylaminobenzoic acid precursors
Osborne, Alan G.; Goolamali, Zia
Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy, 2000 , vol. 56, # 6 p. 1079 - 1100
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http://dx.doi.org/10.1016/S1386-1425(99)00206-1