Bioactivity-guided approach is a valuable tool for isolating active compounds.
Phenethyl cinnamides and 3,4,5-triCQA show the best α-glucosidase inhibition.
3,4,5-TriCQA and diCQAs are the predominant antioxidants.
Caffeoylation of quinic acid and methoxylation of flavonol improve the antioxidant activity.
Methylation and cis structure weak the α-glucosidase inhibition of phenethyl cinnamides.