25826
Cyperi Rhizoma inhibits the 1 - methyl - 4 - phenyl - 1 , 2 , 3 , 6 - tetrahydropyridine - induced reduction in nigrostriatal dopaminergenic neurons in estrogen - deprived mice .
 Chemical: 1 - methyl - 4 - phenyl - 1 , 2 , 3 , 6 - tetrahydropyridine; Chemical: estrogen
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: 1 - methyl - 4 - phenyl - 1 , 2 , 3 , 6 - tetrahydropyridine; Chemical: estrogen