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In the first experiment , four groups of mice received physiological saline ( 0 . 9 % ) , L - arginine ( 300 mg / kg , i . p . ) , L - NAME ( 100 mg / kg , i . p . ) and diazepam ( 2 mg / kg ) , respectively .
 Chemical: L - arginine; Chemical: L - NAME; Chemical: diazepam
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: L - arginine; Chemical: L - NAME; Chemical: diazepam