12422
The potent topoisomerase II inhibitor indenoindolone derivatives exhibited good anticancer activities compared to etoposide and 5 - fluorouracil , and relatively low toxicity to normal cells .
 Chemical: indenoindolone; Chemical: etoposide; Chemical: 5 - fluorouracil
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: indenoindolone; Chemical: etoposide; Chemical: 5 - fluorouracil