30189
Using human umbilical vein endothelial cells as an in vitro model , the angiogenic effect of 2 was found to occur via suppression of all three main functions of endothelial cells , namely proliferation , tube formation and migration .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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