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The BR biosynthesis inhibitors of the YCZ series. (A) Structures of ketoconazole and representatives of the YCZ series. (B) General scheme for synthesis of BR biosynthesis inhibitors of the YCZ type. Abbreviations: Et3N, triethylamine; DMF, N,N-dimethylforamide; RT, room temperature; TfOH, trifluoromethanesulfonic acid; TsCl, tosyl chloride. Numbering of compound 7m refers to [170], of G1 and G2 to [169] and of compound 1/7a to [170,219].
