25555
Chelating agents such as EDTA , EGTA , and 1 , 10 - phenantroline blocked Heminecrolysin - induced LPC hydrolysis at 98 , 48 , and 70 % respectively .
 EDTA, EGTA, 1 , 10 - phenantroline
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 EDTA, EGTA, 1 , 10 - phenantroline