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A phase I clinical study of the antipurine antifolate lometrexol ( DDATHF ) given with oral folic acid .
 Chemical: antipurine; Chemical: lometrexol; Chemical: DDATHF; Chemical: folic acid
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: antipurine; Chemical: lometrexol; Chemical: DDATHF; Chemical: folic acid