11305
Novel P2 tris - tetrahydrofuran group in antiviral compound 1 ( GRL - 0519 ) fills the S2 binding pocket of selected mutants of HIV - 1 protease .
 Chemical: tris - tetrahydrofuran; Chemical: GRL - 0519
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: tris - tetrahydrofuran; Chemical: GRL - 0519