15214
In drug combination studies , compound 15 showed good efficacy in vivo with artemisinin and azithromycin .
 Chemical: artemisinin; Chemical: azithromycin
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: artemisinin; Chemical: azithromycin