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Among the artemisinin - based combination therapy ( ACT ) regimens , artemisinin derivative , artemether in combination with lumefantrine ( artemether - lumefantrine , AL ) has achieved excellent results in the fight against malarial scourge .
 Chemical: artemisinin; Chemical: artemisinin; Chemical: artemether; Chemical: lumefantrine; Chemical: artemether; Chemical: lumefantrine
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: artemisinin; Chemical: artemether; Chemical: lumefantrine; Chemical: artemether; Chemical: lumefantrine