2173
Pretreatment with pranlukast ( 1 . 5 ng / mouse , intracerebroventricularly ) , a CysLT ( 1 ) R antagonist , blocked LTD4 - induced amyloidogenesis , memory deficits .
 Chemical: pranlukast; Chemical: LTD4
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: pranlukast; Chemical: LTD4