7179
Systemic ghrelin administration ( 3 nmol , i . v . ) followed by no food induced a decrease in dopamine levels via activation of kappa opioid receptors in the VTA .
 Chemical: dopamine
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: dopamine