4521
EUK - 8 is a novel , synthetic , low - molecular - weight salen - manganese complex that exhibits both superoxide dismutase and catalase activities in vitro .
 superoxide dismutase, catalase
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 superoxide dismutase, catalase