Representative histological sections of liver and kidney in acute toxicity testing. (2A and 2B) Rats treated with 5 ml/kg vehicle (10% Tween-20). (2C and 2D) Rats treated with 2 g/kg (5 ml/kg) CLRE. (2E and 2F) Rats treated with 5 g/kg (5 ml/kg) CLRE. There was no significant difference in the structures of liver and kidney between treated and control groups (H&E stain ×20).