20229
Discovery of oxysterol - derived pharmacological chaperones for NPC1 : implication for the existence of second sterol - binding site .
 Chemical: oxysterol; Chemical: sterol
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: oxysterol; Chemical: sterol