1141
The serum FBAL concentration subsequently decreased to 352 ng / ml , the same as the value measured on the first day of S - 1 administration .
 Chemical: FBAL
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: FBAL