23998
Moreover , in the brain regions studied , amitraz induced a statistically significant decrease in the metabolite 5 - HIAA , MHPG , DOPAC and HVA levels displaying an age interaction , excepting the 5 - HIAA decrease in midbrain and the DOPAC decrease in hypothalamus and striatum which were without age interaction .
 Chemical: amitraz; Chemical: 5 - HIAA; Chemical: MHPG; Chemical: DOPAC; Chemical: HVA; Chemical: 5 - HIAA; Chemical: DOPAC
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: amitraz; Chemical: 5 - HIAA; Chemical: MHPG; Chemical: DOPAC; Chemical: HVA; Chemical: 5 - HIAA; Chemical: DOPAC