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Nociceptin , also known as orphanin FQ , is an endogenous ligand for the orphan opioid receptor - like receptor 1 ( ORL1 ) and involves in various functions in the central nervous system ( CNS ) .
 Chemical: Nociceptin; Chemical: orphanin FQ
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: Nociceptin; Chemical: orphanin FQ