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Oral GRPE and GOPE administration ( 125 - 1000mg / kg ) produced a dose - dependent decrease in sleep latency and an increase in sleep duration in pentobarbital - treated mice .
 Chemical: pentobarbital
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: pentobarbital