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In mice , MPTP significantly decreased the levels of dopamine in the striatum and behavior performance ; in contrast , both CRE and 17 beta - estradiol benzoate ( EB ) recovered these parameters to normal levels .
 Chemical: MPTP; Chemical: dopamine; Chemical: 17 beta - estradiol benzoate
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: MPTP; Chemical: dopamine; Chemical: 17 beta - estradiol benzoate