22661
The overproduction of IL - 6 plays an important role in the prognosis of RA , but the active compounds from the extracts of Caesalpinia sappan L . suppressing IL - 6 production remain unknown .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None