13820
Here we report on multifunctional thermo - responsive poly ( N - isopropylacrylamide - co - acrylamide ) - block - poly ( epsilon - caprolactone ) random block copolymer micelles as magnetic hyperthermia - mediated payload release and imaging agents .
 poly ( N - isopropylacrylamide - co - acrylamide ) - block - poly ( epsilon - caprolactone )
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 poly ( N - isopropylacrylamide - co - acrylamide ) - block - poly ( epsilon - caprolactone )