| http://www.w3.org/ns/prov#value | - Salts formed from free carboxyl groups may also be derived from inorganic bases such as, for example, sodium, potassium, ammonium, calcium, or ferric hydroxides, and such organic bases as isopropylamine, trimethylamine, 2-ethylaminoethanol, histidine, procaine, or organic salts such as citrate, fumarates, and the like.
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