17396
A dose - dependent response against enzymes with biological significance ( alpha - glucosidase , acetylcholinesterase and butyrylcholinesterase ) and free radicals ( DPPH , nitric oxide , superoxide and hydroxyl ) was found , Phaeophyta being the most promising group .
 Chemical: DPPH; Chemical: nitric oxide; Chemical: superoxide; Chemical: hydroxyl
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, nitric oxide, superoxide, hydroxyl 
Answer:
 Chemical: DPPH; Chemical: nitric oxide; Chemical: superoxide; Chemical: hydroxyl