29690
Dox molecules released from the [ p ( NIPAM ) 55 - b - p ( His ) n ] micelles remain biologically active and have stimuli responsive capability to kill cancer cells .
 Dox, p ( NIPAM ) 55 - b - p ( His ) n
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Dox, p ( NIPAM ) 55 - b - p ( His ) n