“… PAs differed greatly, which may … acid, 92.5%; tannic acid , 90.0%; gallic acid, 86.8%; sinapinic acid, 86.2%; ferulic acid, 81.1%; chlorogenic acid, 69.4%; gentisic acid, ….4%; moreover, p-hydroxybenzoic acid and m-coumaric acid had the least blocking effect or even slight catalyzing effect.”