10604
( + ) - Usnic acid ( green ) is a weak antimalarial agent , however , in conjugation with known antimalarial scaffolds and drugs , such as dihydroartemisinin ( blue ) , potent activity against the blood - stage parasite can be seen both in vitro and in vivo .
 Chemical: ( + ) - Usnic acid; Chemical: dihydroartemisinin
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: ( + ) - Usnic acid; Chemical: dihydroartemisinin