title: N-acetyl-L-cysteine: an alternative to 2-mercaptoethanol in the reduction of Udenfriend's chromophore used for the determination of urinary 5-hydroxyindoleacetic acid.
mesh_terms: D000111:Acetylcysteine; D003124:Colorimetry; D004121:Dimethyl Sulfoxide; D006801:Humans; D006897:Hydroxyindoleacetic Acid / Q000652:urine*; D008623:Mercaptoethanol; D009603:Nitroso Compounds; D010084:Oxidation-Reduction; D013053:Spectrophotometry
chemical_list: D009603:Nitroso Compounds; D006897:Hydroxyindoleacetic Acid; D008623:Mercaptoethanol; C025341:1-nitroso-2-naphthol; D000111:Acetylcysteine; D004121:Dimethyl Sulfoxide