12015
Dopamine levels in the fish brains increased in a dose - dependent manner , while 5 - hydroxytryptamine and norepinephrine levels decreased significantly in the TBT exposure group compared to the control .
 Chemical: Dopamine; Chemical: 5 - hydroxytryptamine; Chemical: norepinephrine; Chemical: TBT
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; Chemical: 5 - hydroxytryptamine; Chemical: norepinephrine; Chemical: TBT