20016
All synthesized 3 , 3 ' - diindolylmethanes showed promising antileishmanial activity against Leishmania donovani promastigotes as well as axenic amastigotes .
 Chemical: 3 , 3 ' - diindolylmethanes
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
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Answer:
 Chemical: 3 , 3 ' - diindolylmethanes