19797
The inhibitory effect of 1 on the receptor activator of nuclear factor kappa B ligand - induced osteoclastic differentiation of RAW 264 . 7 macrophage cells was also more potent than that of 2 .
 None
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