6606
Our study found that oral administration of green tea extract prevented CCl ( 4 ) - induced hepatic fibrosis , as evidenced by a decreased hydroxyproline level in the liver and a reduced incidence of hepatic fibrosis by histological observations .
 Chemical: CCl ( 4 ); Chemical: hydroxyproline
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: CCl ( 4 ); Chemical: hydroxyproline