4-Methoxy-1-methylindole has been used:as internal standard for the quantification of indole-3-carbinol acetate, indole-3-carbinol and 3,3′-diindolylmethane in mouse plasma, liver and kidney tissues by HPLCin preparation of ethyl 9-methoxy-3,4,5-trimethylpyrrolo[3,2-b]carbazole-2-carboxylate
