28551
In this study , a novel series of cycloartane triterpenoids isolated from Schisandra glaucescens Diels was found to have ER antagonistic effect , the most potent antagonist of which exhibited activity with EC50 value of 2 . 55 and 4 . 68 mu M for ER alpha and ER beta , respectively .
 Chemical: cycloartane triterpenoids
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
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Answer:
 Chemical: cycloartane triterpenoids