13276
Synthesis of long - circulating , backbone degradable HPMA copolymer - doxorubicin conjugates and evaluation of molecular - weight - dependent antitumor efficacy .
 Chemical: HPMA; Chemical: doxorubicin
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: HPMA; Chemical: doxorubicin