9364
The purpose of this study was to quantitatively determine the contribution of PepT1 [ peptide transporter 1 ( SLC15A1 ) ] to the intestinal permeability of valacyclovir , an ester prodrug of the antiviral drug acyclovir .
 Chemical: valacyclovir; Chemical: acyclovir
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: valacyclovir; Chemical: acyclovir