Litiumkomplekser av N-(1-hydroksymetyl-2,3-dihydroksypropyl)- 1,4,7-triskarboksymetyl-1,4,7,10-tetraazasyklododekan, samt deres fremstillingog anvendelse

摘要

The invention relates to crystalline lithium complexes of N-(1-hydroxymethyl-2,3-dihydroxypropyl)-1,4,7-triscarboxymethyl-1,4,7,10 tetraazacyclododecane, their production and the recovery of the salt-free gadolinium complex of N-(1-hydroxymethyl-2,3-dihydroxypropyl)-1,4,7-triscarboxymethyl-1,4,7,10 tetraazacyclododecane from the latter without the use of ion exchangers.