6548
Brain - permeable compound 27 , a potent member of the series displayed excellent selectivity against related family members ( H ( 1 ) , H ( 2 ) , and H ( 4 ) receptors ) .
 None
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