The molecule is a tricarboxylic acid that consists of 1,4,7,10-tetraazacyclododecane bearing three carboxymethyl substituents at positions 1, 4 and 7 as well as a 2-hydroxypropyl group at position 10. It is a conjugate acid of a HP-DO3A(3-). It derives from a hydride of a 1,4,7,10-tetraazacyclododecane.
2-[4,7-bis(carboxymethyl)-10-(2-hydroxypropyl)-1,4,7,10-tetrazacyclododec-1-yl]acetic acid