493
CONCLUSIONS : Both timolol solution and timolol gellan decrease the mean 24 - hour heart rate compared with placebo .
 Chemical: timolol; Chemical: timolol
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: timolol; Chemical: timolol