Patent ID: 8623661

Claim:
An iron chelating agent, having chelating ability with iron ions, wherein the chelating agent is a compound represented by the following formula (I) or a salt thereof, wherein Z represents an aromatic hydrocarbon ring or an aromatic heterocyclic ring, R 1 in formula (I) is a methylene group, R 2 and R 3 each independently represent a group having chelating ability, an R 2 group having chelating ability in formula (1), which the sum coordination number of groups represented by R 2 and R 3 is 2, is a carboxyalkyl group, a hydroxyalkyl group, a carbamoylalkyl group, a pyridylalkyl group, a pyrazinylalkyl group, a pyrimidinylalkyl group a pyrrolylalkyl group, an imidazolylalkyl group, a benzoimidazolyalkyl group or a pyrazolylalkyl group, an R 3 group having chelating ability in formula (1) is a hydroxymethyl group, a 1-hydroxyethyl group, a (p-hydroxyphenyl)methyl group, an indolylmethyl group, a carbamoylmethyl group, a 2-carbamoylethyl group, a carboxymethyl group, a 2-carboxyethyl group, a 4-aminobutyl group, a (1H-imidazol-4-yl)methyl group, a 3-guanidinoproryl group, a mercaptomethyl group or a 2-methylthioethyl group.