18019
Compound 5 showed a good xanthine oxidase inhibitory activity ; the other tested compounds were moderately active .
 Chemical: xanthine
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: xanthine 
Answer:
 Chemical: xanthine