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Metabolite identification of Compound 20. Representative chromatography (A); MS/MS spectrum of parent Compound 20 (B); M-1, dimethylbenzimidazole dihydroxylation (C); M-2, M-4, and M-5 dimethylbenzimidazole monohydroxylation (D); M-3, demethylenation (E); M-6, methylbenzene monohydroxylation (F).
