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The acute tocxicity (LD50) of the compound of Example 2 was determined by the use of SD strain male and femail rats (4 weeks old) which were orally or intravenously administered the compound. LD50 against both male and female rats ranged from 1200 to 1300 mg/kg for oral administration ann from 800 to 1000 mg/kg for intravenous administration.
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