label: 1,4,7-triazacyclononane-1-(methyl(2-carboxyethyl)phosphinic acid)-4,7-bis(methyl(2-hydroxymethyl)phosphinic acid)
label_lc: 1,4,7-triazacyclononane-1-(methyl(2-carboxyethyl)phosphinic acid)-4,7-bis(methyl(2-hydroxymethyl)phosphinic acid)