Uroporphyrinogen III

5,10,15,20,22,24-Hexahydrouroporphyrin III

2,7,12,18-Tetrakis(2-oxo-2-hydroxyethyl)-3,8,13,17-tetrakis(3-oxo-3-hydroxypropyl)-5,10,15,20,22,24-hexahydro-21H,23H-porphyrin