27390
3 - ( 4 ' - Methoxyphenyl ) - 6 - nitrocoumarin ( 15 ) , with the same substitution pattern as that of compound 8 , was found to be the most active MAO - B inhibitor of the coumarin series ( IC50 = 3 nM ) .
 Chemical: 3 - ( 4 ' - Methoxyphenyl ) - 6 - nitrocoumarin; Chemical: coumarin
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 - ( 4 ' - Methoxyphenyl ) - 6 - nitrocoumarin; Chemical: coumarin