22400
Parenteral artesunate ( ARS ) is the drug of choice for the treatment of severe malaria .
 Chemical: artesunate; Chemical: ARS
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: artesunate; Chemical: ARS