7724
Administration of the opioid antagonist naloxone to offspring given a palatable diet postweaning significantly reduced fat intake in control offspring ( males : 7 . 7 +/- 0 . 7 vs . 5 . 4 +/- 0 . 6 g / kg / d ; females : 6 . 9 +/- 0 . 3 vs . 3 . 9 +/- 0 . 5 g / kg / d ; P < 0 . 05 ) , but not in male JF offspring ( 8 . 6 +/- 0 . 6 vs . 7 . 1 +/- 0 . 5 g / kg / d ) and was less effective at reducing fat intake in JF females ( 42 . 2 +/- 6 . 0 vs . 23 . 1 +/- 4 . 1 % reduction , P < 0 . 05 ) .
 Chemical: naloxone
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: naloxone