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In this study , we addressed that puerarin attenuated 1 - methyl - 4 - phenyl - 1 , 2 , 3 , 6 - tetrahydropyridine ( MPTP ) - induced behavioral deficits , dopaminergic neuronal degeneration and dopamine depletion .
 Chemical: puerarin; Chemical: 1 - methyl - 4 - phenyl - 1 , 2 , 3 , 6 - tetrahydropyridine; Chemical: MPTP; Chemical: dopamine
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: puerarin; Chemical: 1 - methyl - 4 - phenyl - 1 , 2 , 3 , 6 - tetrahydropyridine; Chemical: MPTP; Chemical: dopamine