1553
Either pethidine HCl ( 50 mg / kg s . c . ) or methadone HCl ( 8 mg / kg s . c . ) produced a prominent decrease in locomotor activity of rats .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 None