9167
Besides this , the effect of SAL on neural stem cells ( NSCs ) which are potential candidates for adult neurogenesis and transplantation mediated rejuvenating attempts for Parkinson ' s disease ( PD ) brain has not been known so far .
 Chemical: SAL
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: SAL