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Here , we examined the effects produced by haloperidol , a typical antipsychotic drug , on the phosphorylation of rpS6 at Ser240 / 244 in the striatum , a brain region involved in neurodegenerative and neuropsychiatric disorders .
 Chemical: haloperidol; Chemical: Ser240
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: haloperidol; Chemical: Ser240