673. The proton magnetic resonance spectra of porphyrins. Part I. The effect of β-substitution on the proton chemical shifts of porphyrins
- 1 January 1961
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society
- p. 3468-3474
- https://doi.org/10.1039/jr9610003468