3988
Of the CCK - 2 - 8 analogues , Ser ( SO3H ) 7 - Ac - CCK - 2 - 8 - SE and Thr ( SO3H ) 7 - Ac - CCK - 2 - 8 - SE and Hyp ( SO3H ) - Ac - CCK - 2 - 8 - SE were slightly more active than CCK - 8 - SE .
 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