25079
This study investigated the effect of in vitro gastrointestinal digestion on the stability and composition of flavan - 3 - ols from red grape skin and seed extracts ( raw and purified , which are high in proanthocyanidins ( PAs ) ) .
 Chemical: flavan - 3 - ols; Chemical: proanthocyanidins; Chemical: PAs
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: flavan - 3 - ols; Chemical: proanthocyanidins; Chemical: PAs