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Recombinant B . bauhinioides kallikrein inhibitor and recombinant B . bauhinoides cruzipain inhibitor , even at high doses , did not affect hMSC proliferation while 5 - fluorouracil greatly reduced the proliferation rates of hMSCs .
 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