27468
The most potent tool compounds , as exemplified by compounds 2l , 5b , 5d , and 5e , displayed antagonism potencies in the subnanomolar range in in vitro human - H3R FLIPR assays and rhesus monkey H3R binding assays .
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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:
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