22771
Computational docking studies combined with site - direct mutagenesis identified several key residues within the ligand binding pocket of PXR that constitute points of interaction with amprenavir .
 Chemical: amprenavir
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: amprenavir