894
In addition to a previously described oxysterol , 3 beta , 5 alpha - dihydroxycholest - 7 - en - 6 - one ( DHCEO ) , we provide evidence for the chemical structures of three new oxysterols in the brain and / or liver tissue of Dhcr7 - KO mice , two of which were quantified .
 oxysterol, 3 beta , 5 alpha - dihydroxycholest - 7 - en - 6 - one, DHCEO, oxysterols
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 oxysterol, 3 beta , 5 alpha - dihydroxycholest - 7 - en - 6 - one, DHCEO, oxysterols