9060
This study investigated whether the serotonin 5 - HT1A receptor agonist 8 - hydroxy - 2 - ( di - n - propylamino ) tetralin ( 8 - OH - DPAT ) can induce compulsive checking in a large open field , as does the dopamine D2 / D3 receptor agonist quinpirole .
 Chemical: serotonin; Chemical: 8 - hydroxy - 2 - ( di - n - propylamino ) tetralin; Chemical: 8 - OH - DPAT; Chemical: dopamine; Chemical: quinpirole
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: serotonin, 8 - hydroxy - 2 - ( di - n - propylamino ) tetralin, 8 - OH - DPAT, dopamine, quinpirole 
Answer:
 Chemical: serotonin; Chemical: 8 - hydroxy - 2 - ( di - n - propylamino ) tetralin; Chemical: 8 - OH - DPAT; Chemical: dopamine; Chemical: quinpirole