10553
Recently , the World Health Organization approved the nifurtimox - eflornithine combination therapy for the treatment of human African trypanosomiasis , renewing interest in nitroheterocycle therapies for this and associated diseases .
 Chemical: nifurtimox; Chemical: eflornithine
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: nifurtimox; Chemical: eflornithine