18829
Racemic IKM - 159 was crystallized with the ligand - binding domain of GluA2 , and the structure revealed a complex containing ( 2R ) - IKM - 159 at the glutamate binding site .
 Chemical: Racemic IKM - 159; Chemical: ( 2R ) - IKM - 159
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: Racemic IKM - 159; Chemical: ( 2R ) - IKM - 159