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The pro - arrhythmic effects of estrogens were abolished by MPP combined with PHTPP , suggesting the involvements of both ER alpha and ER beta signaling .
 Chemical: estrogens; Chemical: MPP; Chemical: PHTPP
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: estrogens; Chemical: MPP; Chemical: PHTPP