10223
In virgin rats fasted overnight , the spontaneous firing rate of oxytocin neurones was significantly lower than in unfasted rats , although leptin had a similar excitatory effect as in unfasted rats .
 Chemical: oxytocin
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: oxytocin