22437
Despite preferentially activating estrogen receptor alpha , 8 - PN is only slightly uterotrophic , but it also elucidates estrogenic effects on the mammary gland .
 Chemical: estrogen; Chemical: 8 - PN
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: estrogen; Chemical: 8 - PN