3728540 -OEChem-02060822572D 0 0 0 0 0 0 0 0 0999 V2000 M END > 3728540 > 2 > ChemIDplus > 001976858 > 1976-85-8 21H,23H-Porphine-2,7,12,18-tetrapropanoic acid, 3,8,13,17-tetrakis(carboxymethyl)-5,10,15,20,22,24-hexahydro- Urogen III > 1976-85-8 > 001976858 > http://chem.sis.nlm.nih.gov/chemidplus/ > http://chem.sis.nlm.nih.gov/chemidplus/direct.jsp?result=advanced®no=001976858 $$$$