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In our study , 12 albinos Sprague - Dawley ( SD ) and 12 pigmented Brown Norway ( BN ) rats were treated orally for 3 months with chloroquine to compare functional and pathological findings .
 Chemical: chloroquine
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: chloroquine