| http://www.w3.org/ns/prov#value | - Salts are especially the pharmaceutically acceptable or non-toxic salts of compounds of formula I. Such salts are formed, for example, by compounds of formula (I) having an acid group, for example a carboxy group or a sulfo group, and are, for example, salts thereof with suitable bases, such as non-toxic metal salts derived from metals of groups Ia, Ib, Ha and lib of the Periodic Table of the Elem
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