4603
Of the 19 evaluable patients with prior doxorubicin exposure , 11 ( 58 % ) responded compared with nine of 15 ( 60 % ) without prior doxorubicin .
 Chemical: doxorubicin; Chemical: doxorubicin
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: doxorubicin; Chemical: doxorubicin