[1] At the center of a hydrolysable tannin molecule, there is a carbohydrate (usually D-glucose but also cyclitols like quinic or shikimic acids).
[3][4] 50 mg of sample tannin in 5 ml 2N H2SO4 are put into constricted test tubes and frozen.
10 mg of samples tannin in 1 ml 2N H2SO4 are put into constricted test tubes and frozen.
The sample is quickly mixed after 0.10 ml of 1% (w/v) NaNO2 in water and the absorbance 538 nm is immediately recorded.
Tannins, including gallo and ellagic acid (epigallitannins), are inhibitors of HIV replication.
[6] In the past few years, hydrolysable tannins have also been studied for their potential effects against cancer through different mechanisms.