16613
Inhibitory effect of dihydroartemisinin against phorbol ester - induced cyclooxygenase - 2 expression in macrophages .
 Chemical: dihydroartemisinin; Chemical: phorbol ester
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: dihydroartemisinin; Chemical: phorbol ester