12237
At 12 . 5 micro M concentration , recombinant B . bauhinoides cruzipain inhibitor and recombinant B . bauhinioides kallikrein inhibitor were more efficient than 5 - fluorouracil in inhibiting MKN - 28 and Hs746T ( gastric ) , HCT116 and HT29 ( colorectal ) , SkBr - 3 and MCF - 7 ( breast ) , and THP - 1 and K562 ( leukemia ) cell lines .
 Chemical: 5 - fluorouracil
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: 5 - fluorouracil