Gadolinium chelate compounds for use in magnetic resonance imaging

摘要

A compound having the formula of tetragadolinium [4,10-bis(carboxylatomethyl)-7-{-3,6,12,15-tetraoxo-16-[4,7,10-tris(carboxylatomethyl)-1,4,7,10-tetraazacyclododecan-1-yl]-9,9-bis({[{2-[4,7,10-tris(carboxylatomethyl)-1,4,7,10-tetraazacyclododecan-1-yl]propanoyl} amino)acetyl]amino}methyl)-4,7,11,14-tetraazaheptadecan-2-yl}-1,4,7,10-tetraazacyclo dodecan-1-yl]acetate wherein the stereochemistry at the chiral carbon of the four alanine substituents is selected from the group consisting of RRRR, SSSS, RSSS, RRSS, and RRRS stereoisomers, and racemic and diastereomeric mixtures of any thereof, or a tautomer, a hydrate, a solvate, or a salt thereof, or a mixture of same is described. The compounds may be used as an MRI contrast imaging agent.