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In contrast , in cases in which a CNS effect is desired , the present results illustrate that synthetic A1 agonists that are transported by hENT1 could be used to target CNS disorders because of enhanced delivery to the brain .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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