AHR and breast cancer: For example, the aminobenzothiazole (2-(4-amino-3-methlyphenyl)-5 fluorobenzothiazole (5F-203) and 2-(4-amino-3-methlyphenyl)benzothiazole (DF-203) are AhR ligands that have been tested for clinical development to treat breast cancer [112,120,121].