11394
The anti - HIV - 1 activity was evaluated and revealed that STLs ( 1 and 2 ) caused a reduction for the viability of mock - infected MT - 4 cells by CC ( 50 ) = 29 . 1 and 0 . 5 mu g / mL , respectively , and caused 50 % protection of MT - 4 cells against HIV - 1 induced cytopathogeneticy by EC ( 50 ) = 29 . 1 and 0 . 5 mu g / mL , respectively , as compared with Efavirenz ( EFV ) as positive control that showed a CC ( 50 ) = 11 . 6 and EC ( 50 ) = 0 . 0006 mu g / mL , using the 3 - ( 4 , 5 - dimethylthiazol - 2 - yl ) - 2 , 5 - diphenyltetrazolium bromide method .
 Chemical: Efavirenz; Chemical: EFV; Chemical: 3 - ( 4 , 5 - dimethylthiazol - 2 - yl ) - 2 , 5 - diphenyltetrazolium bromide
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: Efavirenz, EFV, 3 - ( 4 , 5 - dimethylthiazol - 2 - yl ) - 2 , 5 - diphenyltetrazolium bromide 
Answer:
 Chemical: Efavirenz; Chemical: EFV; Chemical: 3 - ( 4 , 5 - dimethylthiazol - 2 - yl ) - 2 , 5 - diphenyltetrazolium bromide