4602
Nevertheless , some patients with a potentially responsive genotype do not respond , and others develop a pattern of resistance to imatinib which is not associated with secondary mutations .
 Chemical: imatinib
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: imatinib