Hexadecasodium [2-(benzyloxy)-3-({4-[(4-{[3,5-bis(sulfonatooxy)-6-[(sulfonatooxy)methyl]-4-{[3,4,5-tris(sulfonatooxy)-6-[(sulfonatooxy)methyl]oxan-2-yl]oxy}oxan-2-yl]oxy}-3,5-bis(sulfonatooxy)-6-[(sulfonatooxy)methyl]oxan-2-yl)oxy]-3,5-bis(sulfonatooxy)-6-[(sulfonatooxy)methyl]oxan-2-yl}oxy)-5-(sulfonatooxy)-6-[(sulfonatooxy)methyl]oxan-4-yl] sulfate