prov:value
| - The remaining unconverted carboxylic or anhydride groups may remain as such, or may be converted either prior to, during or after the reaction into the form of a salt, as for example, with a metal ion such as a lithium, sodium, potassium, calcium, magnesium, barium, zinc, cobalt, iron, nickel, manganese, copper, strontium, cadmium, tin, aluminum, chromium metal ion, or may be converted to an ester
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