1852
Nowadays valganciclovir ( V - GCV ) , a mono - valyl ester pro - drug of GCV , is available as an oral syrup .
 Chemical: valganciclovir; Chemical: V - GCV; Chemical: mono - valyl ester; Chemical: GCV
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: valganciclovir; Chemical: V - GCV; Chemical: mono - valyl ester; Chemical: GCV