9647
Gadolinium labeled HPMA copolymers were administered to mice bearing prostate tumors immediately before treatment of the right tumor with PPTT .
 Gadolinium, HPMA
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Gadolinium, HPMA