20399
Both extracts proved to be strong radicals ' scavengers and effective monoamine - oxidase A inhibitors , but showed weak protection against cholinesterases ' activity .
 Chemical: monoamine
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: monoamine