21203
Bbil - TX ( 3 - 30 mu g / ml , n = 4 - 6 ) caused partial time - and concentration - dependent blockade in PND preparations ( 52 +/- 2 % at the highest concentration ) .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None