title: [Occurrence of alpha-alkyl-substituted malic acids, and beta-hydroxy-beta-alkyl-substituted dicarboxylic and tricarboxylic acid derivatives in normal urine (author's transl)].
abstract: Urine contains a number of alpha-hydroxy acids so far unknown to occur in biological liquids. Besides the already as urine constituent known methylmalic acid, also the ethyl, isopropyl and butyl derivatives of malic acid were found. Further metabolites in urine are a beta-propyl-substituted beta-hydrosyglutaric acid, a beta-hydroxy-beta-[methyl-carbomethoxy]-adipinic acid and two isomeric alpha-methylcitric acids.
mesh_terms: D004952:Esters / Q000652:urine; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D006801:Humans; D006880:Hydroxy Acids / Q000378:metabolism / Q000652:urine*; D008293:Malates / Q000378:metabolism / Q000652:urine
chemical_list: D004952:Esters; D006880:Hydroxy Acids; D008293:Malates
vernacular_title: Uber das auftreten alpha-alkyl-substituierter Apfelsäuren und beta-hydroxy-beta-alkyl-substituierter Dicarbon-und Tricarbonsäurederivate als normale Stoffwechselprodukte.