4458
These results indicate that both ECPC and ECPA have potential protective effect against A beta - induced neurotoxicity in PC12 cells , and ECPA is more potential of the two species to be used in traditional medicine as a neuroprotective agent for the treatment of AD .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None