+++Chemistry of Heterocyclic Compounds

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1.Synthesis of formyl-substituted porphyrins
G. V. Ponomarev, R. P. Evstigneeva, V. N. Stromnov and N. A. Preobrazhenskii
Chemistry of Heterocyclic Compounds, Volume 2, Number 4,1967

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http://dx.doi.org/10.1007/BF00509450

2. Formylporphyrins and their derivatives in the chemistry of porphyrins (review)
G. V. Ponomarev
Chemistry of Heterocyclic Compounds, Volume 30, Numbers 11-12 , 1994,p.1669-1696

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http://dx.doi.org/10.1007/BF01172868

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