28710
MATERIALS AND METHODS : The aqueous and 80 % MeOH extracts , and a series of fractions and subfractions from the leaves , stem and root bark of Alstonia congensis were tested in vitro for their antiprotozoal activity against Trypanosoma brucei brucei , Trypanosoma cruzi , Lesihamania infantum and the chloroquine and pyrimethamine - resitant K1 strain of Plasmodium falciparum .
 Chemical: MeOH; Chemical: chloroquine; Chemical: pyrimethamine
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: MeOH; Chemical: chloroquine; Chemical: pyrimethamine