5591
In contrast , 7 - hydroxy and 8 , 14 - hydroxy EFV were only detected in blood plasma and seminal plasma with median concentrations of 8 . 84 ng / ml and 10 . 23 ng / ml , and 5 . 63 ng / ml and 5 . 43 ng / ml , respectively .
 Chemical: 7 - hydroxy and 8 , 14 - hydroxy EFV
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: 7 - hydroxy and 8 , 14 - hydroxy EFV