4,4'-(4,10-Bis(2-(tert-butoxy)-2-oxoethyl)-1,4,7,10-tetraazacyclododecane-1,7-diyl)bis(5-(tert-butoxy)-5-oxopentanoic acid) 50mg

4,4'-(4,10-Bis(2-(tert-butoxy)-2-oxoethyl)-1,4,7,10-tetraazacyclododecane-1,7-diyl)bis(5-(tert-butoxy)-5-oxopentanoic acid) 50mg