28195
Molecular docking analysis of the ER / OH - PBDE complexes revealed two distinctive binding modes between low - and high - brominated OH - PBDEs which provided rationale for the difference in their ER activity .
 OH - PBDE, OH - PBDEs
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 OH - PBDE, OH - PBDEs