5590
The 8 - hydroxy EFV metabolite was detected in blood plasma , seminal plasma , and cerebrospinal fluid , with median concentrations of 314 . 5 ng / ml , 358 . 5 ng / ml , and 3 . 37 ng / ml , respectively .
 Chemical: 8 - 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: 8 - hydroxy EFV