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In an effort to identify novel active constituents on the cardiovascular system , a systematic study on macroporous resin adsorption of extracts from the fibrous root of Ophiopogon japonicus was performed in a human myocardial microvascular endothelial cell line ( HMMEC ) based assay .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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