label: (4-(2-(biscarboxymethylamino)-3-(4-nitrophenyl)propyl)-7-carboxymethyl(1,4,7)triazonan-1-yl)acetic acid
label_lc: (4-(2-(biscarboxymethylamino)-3-(4-nitrophenyl)propyl)-7-carboxymethyl(1,4,7)triazonan-1-yl)acetic acid