25597
Background : GPR7 , the endogenous coupled receptor for neuropeptide B and neuropeptide W , is expressed in several regions of the Central Nervous System ( CNS ) , which are involved in the regulation of feeding behaviour .
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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:
 None