New manganese complexes useful as low-toxicity contrast agents for magnetic resonance imaging

摘要

Hydroxyalkyl-1,4,7,10-tetraazacyclododecane-1,7-diacetic acid manganese complexes (I) are new. Manganese complexes of formula (I) are new: R1 = 2-4C alkyl substituted by 1-3 OH groups; R2 = H or R1.