4534
Serum CPK activity for E - I animals was significantly ( p less than 0 . 05 ) greater than for animals in the S - I and EC groups twenty hours following isoproterenol injection .
 Chemical: isoproterenol
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: isoproterenol