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Consequently , two novel peptides with high antioxidant activity were purified , and their amino acid sequences were determined ( Val - Cys - Ser - Val [ VCSV ] and Cys - Ala - Ala - Pro [ CAAP ] , respectively ) .
 amino acid, Val - Cys - Ser - Val, VCSV, Cys - Ala - Ala - Pro, CAAP
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 amino acid, Val - Cys - Ser - Val, VCSV, Cys - Ala - Ala - Pro, CAAP