1852
A lesion induced by 6 - OHDA produced more severe motor deterioration in CB1 KO mice accompanied by more loss of DA neurons and increased PENK gene expression in the CPu .
 Chemical: 6 - OHDA; Chemical: DA; Chemical: PENK
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: 6 - OHDA; Chemical: DA; Chemical: PENK