Flavan-3-ol-cysteine and acetylcysteine conjugates from edible reagents and the stems of Cynomorium songaricum as potent antioxidants.

Highlights: [•] Conjugates of flavan-3-ols with cysteine or acetylcysteine were prepared. [•] The preparation was simple, and all of the reagents were edible. [•] The conjugates had greater radical-scavenging activity than the flavan-3-ols. [•] The flavan-3-ol-cysteine conjugates were active against α-glucosidase. [Copyright &y& Elsevier]