The molecule is an iron chelate that is (3S,7S,11S)-3,7,11-triamino-1,5,9-trioxacyclododecane-2,6,10-trione in which each nitrogen has been acylated by a 2,3-dihydroxybenzoyl group, the six phenolic oxygen atoms being coordinated to Fe(III). It is a conjugate acid of a ferrienterobactin(3-).
[(3S,7S,11S)-7,11-bis[(2,3-dihydroxybenzoyl)azaniumyl]-2,6,10-trioxo-1,5,9-trioxacyclododec-3-yl]-(2,3-dihydroxybenzoyl)azanium;iron