4004
Functional assessment of these antibodies yielded an inhibitory scFv antibody , named E3 , which could attenuate 35 % of FAP cleavage of the fluorescent substrate Ala - Pro - 7 - amido - 4 - trifluoromethylcoumarin compared with nonfunctional scFv control .
 Ala - Pro - 7 - amido - 4 - trifluoromethylcoumarin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Ala - Pro - 7 - amido - 4 - trifluoromethylcoumarin