3101
Flestolol blood concentrations increased linearly with increasing dose and good correlation exists between blood concentrations of flestolol and beta - adrenergic blockade .
 Flestolol, flestolol
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Flestolol, flestolol