491
Timolol gellan showed a numerically but not significantly smaller reduction in 24 - hour heart rate , compared with timolol solution .
 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