26794
Furthermore , unlike the main components of the compound , pyrene and cholesterol , its main chain is composed of multiple hydrophilic structures , and it is this structure that makes the emission of the compound in organic solvents sensitive to the presence of water .
 Chemical: pyrene; Chemical: cholesterol
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: pyrene; Chemical: cholesterol