ChEBI: Corynebactin is a crown compound that is enterobactin in which the pro-R hydrogens at positions 2, 6 and 10 of the trilactone backbone are replaced by methyl groups, and in which a glycine spacer separates the trilactone backbone from each of the catecholamide arms. It is the endogenous siderophore of Bacillus subtilis, used for the acquisition of iron. It has a role as a metabolite and a bacterial metabolite. It is a crown compound, a member of catechols and a macrocyclic lactone.