25501
Caffeic acid phenethyl ester ( CAPE ) and caffeic acid ( CA ) , two naturally occurring phenolic antioxidants , have been reported to have a diversity of biological activities .
 Caffeic acid phenethyl ester, CAPE, caffeic acid
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Caffeic acid phenethyl ester, CAPE, caffeic acid