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GRL - 0519 ( 1 ) is a potent antiviral inhibitor of HIV - 1 protease ( PR ) possessing tris - tetrahydrofuran ( tris - THF ) at P2 .
 Chemical: GRL - 0519; Chemical: tris - tetrahydrofuran; Chemical: tris - THF
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: GRL - 0519; Chemical: tris - tetrahydrofuran; Chemical: tris - THF