11458
The tumor regression study revealed that IFN - alpha 2a - incorporated HA - Tyr hydrogels effectively inhibited tumor growth , while the injection of an IFN - alpha 2a solution did not demonstrate antitumor efficacy .
 Chemical: Tyr
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: Tyr