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Both the oils showed significant radical scavenging activity against DPPH and superoxide radicals with a potent metal chelating activity and were compared with that of standard compound , eugenol .
 Chemical: DPPH; Chemical: superoxide; Chemical: eugenol
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: DPPH, superoxide, eugenol 
Answer:
 Chemical: DPPH; Chemical: superoxide; Chemical: eugenol