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In the present study we tested whether propranolol , a beta - receptor antagonist commonly used as antihypertensive drug , could ameliorate the cognitive impairments and increases in AD - related markers shown by the senescence - accelerated mouse prone - 8 ( SAMP8 ) .
 Chemical: propranolol
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: propranolol