• gadolinium(III) 2,2′,2”-(10-((2R,3S)-1,3,4-trihydroxybutan-2-yl)-1,4,7,10-tetraazacyclododecane-1,4,7-triyl)triacetate2021-11-30
• calcium 2,2′-(7-(carboxymethyl)-10-((2R,3R)-1,3,4-trihydroxybutan-2-yl)-1,4,7,10-tetraazacyclododecane-1,4-diyl)diacetate2021-11-26