1140
Instead , oral administration of S - 1 ( a derivative of 5 - FU ) , at 200 mg / day twice a week , was instituted , because S - 1 has a strong inhibitory effect on dihydropyrimidine dehydrogenase , which catalyzes the degradative of 5 - FU into FBAL .
 Chemical: 5 - FU; Chemical: dihydropyrimidine; Chemical: 5 - FU; 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: 5 - FU; Chemical: dihydropyrimidine; Chemical: 5 - FU; Chemical: FBAL