2703
Pre - treatment of the CCK2 receptor antagonist L - 365 , 260 ( 10ug , i . c . v ) reversed the effects of CCK - 8 , but the CCK1 receptor antagonist L - 364 , 718 ( 10ug , i . c . v ) did not .
 Chemical: CCK - 8
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: CCK - 8