14402
Upon normalization for i1 , a significant reduction of 7 - ethyl - 10 - hydroxycamptothecin glucuronide formation was observed for i1 + i2 clones ( mean of 53 % ) compared with the reference i1 cell line .
 7 - ethyl - 10 - hydroxycamptothecin glucuronide
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 7 - ethyl - 10 - hydroxycamptothecin glucuronide