Characterisation of anthocyanidin reductase from Shuchazao green tea.

Background: Flavan-3-ols, which account for approximately 700-800 g kg(-1) of tea polyphenols, exert many health-promoting effects. Anthocyanidin reductase (ANR) is an important enzyme involved in the biosynthesis of flavan-3-ols in the tea plant. The purpose of this study was to establish a suitable method for the determination of ANR activity.

N-(3,4-Diethoxy-phen-yl)acetamide.

In the title compound, C(12)H(17)NO(3), the conformations of the N-H and C=O bonds are anti to each other. In the crystal structure, N-H⋯O hydrogen-bond inter-actions help to establish the packing.