Identification of 5,6-dimethoxyindolyl-2-carboxylic acid in melanotic urine.
5,6-dimethoxyindolyl-2-carboxylic acid was identified in urine of patients with malignant melanoma by means of gas chromatography - mass spectrometry. Its presence supports the concept of the existence of an efficient methylating activity in melanoma tissue.
D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D007211:Indoles / Q000652:urine*; D013058:Mass Spectrometry; D008545:Melanoma / Q000652:urine*
D007211:Indoles; C039359:5,6-dimethoyxindole-2-carboxylic acid