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( - ) - Epicatechin - 3 - gallate ( ECG ) , a polyphenol extracted from green tea , has been proposed as an effective compound for improving cardiac contractility .
 Chemical: ( - ) - Epicatechin - 3 - gallate; Chemical: ECG; Chemical: polyphenol
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: ( - ) - Epicatechin - 3 - gallate; Chemical: ECG; Chemical: polyphenol