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Using these complementary methods , we demonstrate that hemopressin activates distinct neuronal substrates within the brain , focused mainly on the feeding - related circuits of the mediobasal hypothalamus and in nociceptive regions of the periaqueductal grey ( PAG ) and dorsal raphe ( DR ) .
 Chemical: hemopressin
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: hemopressin