9280
In vitro studies on human ovarian carcinoma A2780 cells were carried out to investigate the cytotoxicity of free PTX , HPMA copolymer - PTX conjugate with Mw of 48 kDa ( P - PTX ) , and mP - PTX .
 Chemical: PTX; Chemical: HPMA; Chemical: PTX; Chemical: PTX; Chemical: PTX
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: PTX; Chemical: HPMA; Chemical: PTX; Chemical: PTX; Chemical: PTX