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While nocistatin ( 0 . 5 - 5 . 0 nmol mouse - 1 , i . c . v . ) administered 30 min before spontaneous alternation performance or the training session of the passive avoidance task , had no effect on spontaneous alternation or passive avoidance behaviours , a lower per cent alternation and shorter median step - down latency in the retention test were obtained in nociceptin ( 1 . 5 and / or 5 . 0 nmol mouse - 1 , i . c . v . ) - treated normal mice .
 Chemical: nocistatin; Chemical: nociceptin
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: nocistatin; Chemical: nociceptin