Citation

Clezy PS , Jenie U Prashar JK (1990) The Chemistry of Pyrrolic Compounds. LXIV. Intramolecular Cyclization of Butyric Acid Substituted Porphyrins: Petroporphyrins With Fused Seven-Membered Ring Systems. Australian Journal of Chemistry 43, 839-856.

https://doi.org/10.1071/CH9900839