1757
Both isomers of propranolol possessed similar depressant potency on isolated atrial muscle taken from guinea - pigs . 5 .
 Chemical: propranolol
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: propranolol