18220
The activity of camptothecin and its derivatives was studied on extracellular L . infantum infrared - emitting promastigotes and on an ex vivo murine model of infected splenocytes with L . infantum fluorescent amastigotes .
 Chemical: camptothecin
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: camptothecin