Main Reaction: Methylgallic acid >> Vanillic acid

Reference: PubMed ID: 27790915
Authors: López de Las Hazas MC, Mosele JI, Macià A, Ludwig IA, Motilva MJ
Title: Exploring the colonic metabolism of grape and strawberry anthocyanins and their in-vitro apoptotic effects in HT-29 colon cancer cells.
Published: 2016 Oct 28

Methylgallic acid --> Vanillic acid