20234
These oxysterol derivatives bind to a domain of NPC1 that is different from the known N - terminal sterol - binding domain ; i . e . , there is an additional sterol - binding site on NPC1 .
 Chemical: oxysterol; Chemical: N; Chemical: sterol; 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: N; Chemical: sterol; Chemical: sterol