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To evaluate the neuroprotective effect of CRE , we measured striatal dopamine , movement ability , tyrosine hydroxylase ( TH ) immunoreactivity , and apoptosis - related protein expression levels after treatment of CRE either with or without 1 - methyl - 4 - phenyl - 1 , 2 , 3 , 6 - tetrahydropyridine ( MPTP ) in ovariectomized female mice .
 Chemical: dopamine; Chemical: tyrosine; Chemical: 1 - methyl - 4 - phenyl - 1 , 2 , 3 , 6 - tetrahydropyridine; Chemical: MPTP
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: tyrosine; Chemical: 1 - methyl - 4 - phenyl - 1 , 2 , 3 , 6 - tetrahydropyridine; Chemical: MPTP