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Normal control: no visible lesion. Diabetic control: large patches of strong fibrous tissue. BFBC (20 mg/kg): large patches of fibrous tissue. BFBC (200 mg/kg): small patches of fibrous tissue. BFBC (400 mg/kg): small patches of fibrous tissue. GLB (0.07 mg/kg): small patches of strong fibrous tissue. Abbreviation: BFBC, butanol fraction of BC (H&E stained, Mag. ×400).
