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(A) Histological evaluation of the gastric mucosa of rats pre-treated with CMC (ulcer control group); (B) Omeprazole, 20 mg/kg (positive control group); (C) F1 100 mg/kg; (D) F2 100 mg/kg; (E) F3 100 mg/kg; (F) F4 100 mg/kg; (G) F5 100 mg/kg. White arrows represent severe disruptions to the surface epithelium and deep mucosa, while black arrows represent leukocyte infiltration and edema in the submucosal layer (H & E stain; 10×).
