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These in vitro studies demonstrate that Fe ( 3 ) O ( 4 ) - NPs may decrease neuron viability , trigger oxidative stress , and activate JNK - and p53 - mediated pathways to regulate the cell cycle and apoptosis .
 Chemical: Fe ( 3 ) O ( 4 )
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: Fe ( 3 ) O ( 4 )