| http://www.w3.org/ns/prov#value | - As used herein the terms ???oxoacid??? and ???alpha keto acid??? refer to a compound with the general structure: where R can represent hydrogen or a large variety of alkyl groups, saturated or unsaturated, linear or branched, optionally substituted by hydroxy, amino, phenyl, hydroxy-phenyl, carboxy, mercapto, methylthio, guanidino, and other groups.
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