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Metoprolol was dosed to achieve a resting predobutamine heart rate below 65 beats / minute or a total intravenous dose of 20 mg .
 Chemical: Metoprolol; Chemical: predobutamine
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: Metoprolol; Chemical: predobutamine