7691
However , when physiopathological conditions prevail - i . e . oxidative stress , excitotoxicity , and inflammation - preferential formation and accumulation of toxic metabolites could trigger factors for degeneration in neurological disorders .
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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