S0456

S0456, a near-infrared (NIR) fluorescent dye, binds to the folate receptor (FR) and is utilized in the synthesis of Pafolacianine. It serves as a tumor-specific optical imaging agent with an excitation wavelength of 788 nM and an emission wavelength of 800 nM [1].

O=S(CCCCN1C2=CC=C(S(=O)([O-])=O)C=C2C(C)(/C1=C/C=C3C(Cl)=C(CCC/3)/C=C/C4=[N+](C5=CC=C(S(=O)([O-])=O)C=C5C4(C)C)CCCCS(=O)([O-])=O)C)([O-])=O.[Na+].[Na+].[Na+]