23192
Docking study of the synthesized compound 8a into the active site of COX - 2 revealed a similar binding mode to SC - 558 , a selective COX - 2 inhibitor .
 Chemical: SC - 558
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: SC - 558