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17 beta estradiol regulation of connexin 43 - based gap junction and mechanosensitivity through classical estrogen receptor pathway in osteocyte - like MLO - Y4 cells .
 Chemical: 17 beta estradiol; Chemical: estrogen
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: 17 beta estradiol; Chemical: estrogen