1,4,7,10-Tetraazacyclododecane-1,4,7,10-tetraacetic acid, 2-((4-nitrophenyl)methyl)- 123317-51-1 2-((4-Nitrophenyl)methyl)-1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid 2-(4-Nitrobenzyl)-1,4,7,10-tetraazacyclododecane-N,N',N'',N'''-tetraacetic acid Nitrobenzyl-dota