polyaminopolycarboxylic
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polyaminopolycarboxylic acid — noun Any of a class of polycarboxylic acids that have a backbone containing several amino groups; they form chelation complexs with metals; the most common example is ethylenediaminetetracetic acid … Wiktionary
polyaminopolycarboxylate — noun Any salt or ester of a polyaminopolycarboxylic acid … Wiktionary