6235
A comparative study with pure thalidomide ( NKTA ) has also been performed to describe the efficacy of these derivatives in blocking angiogenesis .
 Chemical: thalidomide
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: thalidomide