How is 3-[12-(1-{1-[13,17-Bis(2-carboxyethyl)-7-(1-hydroxyethyl)-3,8,12,18-tetramethyl-2-porphyrinyl]ethoxy}ethyl)-18-(2-carboxyethyl)-7-(1-hydroxyethyl)-3,8,13,17-tetramethyl-2-porphyrinyl]propanoic acid (CAS: 87806-31-3) typically synthesized?

This compound is synthesized through multi-step organic synthesis involving the formation of porphyrin and its derivatives. Key steps include condensation reactions, alkylation, and esterification. The synthesis typically requires precise control of conditions, such as temperature and pH, to ensure high yield and selectivity. Commonly used catalysts include organic bases and transition metal complexes.