27386
Several 3 - arylcoumarin derivatives were previously described as interesting selective MAO - B inhibitors .
 Chemical: 3 - arylcoumarin
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: 3 - arylcoumarin