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We aimed to investigate the influence of verapamil ( a P - gp inhibitor ) - - bufadienolides interaction on cardiotoxicity and bufadienolide uptake by the isolated heart .
 Chemical: verapamil; Chemical: bufadienolides; Chemical: bufadienolide
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: verapamil; Chemical: bufadienolides; Chemical: bufadienolide