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In addition , the two benzoxazines were found to have a minor affinity for the hERG potassium channel compared to their corresponding ketone analogues .
 Chemical: benzoxazines; Chemical: potassium; Chemical: ketone
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: benzoxazines; Chemical: potassium; Chemical: ketone