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EDTA HOOCHC Chcoo NH+-CH,-CHb-NH+ OOCHC CHb COoH 乙二胺四乙酸(H4Y) Ethylene diamine Tetra Acetic acid 乙二胺四乙酸二钠盐(Na2H2Y·2H2O)2 EDTA 乙二胺四乙酸 (H4Y) Ethylene Diamine Tetra Acetic acid 乙二胺四乙酸二钠盐(Na2H2Y·2H2O) HOOCH2C -OOCH2C CH2COOCH2COOH NH+ -CH2 -CH2 -NH+