9462
Synthesis and biological evaluation of indenoisoquinolines that inhibit both tyrosyl - DNA phosphodiesterase I ( Tdp1 ) and topoisomerase I ( Top1 ) .
 indenoisoquinolines
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 indenoisoquinolines