4773
For this purpose , bile salt pool composition , synthesis of individual BS in vivo , hepatic activities , and expression levels of cholesterol 7alpha - hydroxylase ( CYP7A ) , and sterol 27 - hydroxylase ( CYP27 ) , as well as of other enzymes involved in BS synthesis , were analyzed in rats treated with EE ( 5 mg / kg , 3 days ) or its vehicle .
 Chemical: bile salt; Chemical: BS; Chemical: cholesterol; Chemical: sterol; Chemical: BS; Chemical: EE
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: bile salt; Chemical: BS; Chemical: cholesterol; Chemical: sterol; Chemical: BS; Chemical: EE