6563
Of importance , the anticancer drug 5 - fluorouracil was an excellent substrate for TbU3 , and several 5 - fluoropyrimidine analogs were investigated for uptake and trypanocidal activity ; 5F - orotic acid , 5F - 2 ' deoxyuridine displayed activity in the low micromolar range .
 Chemical: 5 - fluorouracil; Chemical: 5 - fluoropyrimidine; Chemical: 5F - orotic acid; Chemical: 5F - 2 ' deoxyuridine
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: 5 - fluorouracil, 5 - fluoropyrimidine, 5F - orotic acid, 5F - 2 ' deoxyuridine 
Answer:
 Chemical: 5 - fluorouracil; Chemical: 5 - fluoropyrimidine; Chemical: 5F - orotic acid; Chemical: 5F - 2 ' deoxyuridine