25370
We investigated how the structural properties of ( + ) - catechin , ( - ) - epicatechin , ( - ) - epigallocatechin ( EGC ) and ( - ) - epigallocatechin - 3 - gallate ( EGCG ) and butylated hydroxytoluene ( BHT ) correlate with structural changes of phosphatidylcholine plus sphingomyelin ( 2 . 4 : 1 ) model lipid membranes .
 ( + ) - catechin, ( - ) - epicatechin, ( - ) - epigallocatechin, EGC, ( - ) - epigallocatechin - 3 - gallate, EGCG, butylated hydroxytoluene, BHT, phosphatidylcholine, sphingomyelin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 ( + ) - catechin, ( - ) - epicatechin, ( - ) - epigallocatechin, EGC, ( - ) - epigallocatechin - 3 - gallate, EGCG, butylated hydroxytoluene, BHT, phosphatidylcholine, sphingomyelin