13278
The examination of molecular - weight - dependent antitumor activity toward human ovarian A2780 / AD carcinoma in nude mice reveals enhanced activity of multiblock , second - generation , higher molecular weight conjugates when compared with traditional HPMA copolymer - DOX conjugates .
 Chemical: HPMA; Chemical: DOX
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: DOX