673. The proton magnetic resonance spectra of porphyrins. Part I. The effect of β-substitution on the proton chemical shifts of porphyrins
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J. Chem. Soc., 1961, 3468-3474
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673. The proton magnetic resonance spectra of porphyrins. Part I. The effect of β-substitution on the proton chemical shifts of porphyrins
R. J. Abraham, A. H. Jackson and G. W. Kenner, J. Chem. Soc., 1961, 3468 DOI: 10.1039/JR9610003468
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