Compounds 1 and 2 were identified to known hydrolyzable tannins, vescalagin and castalagin (4), respectively, by direct comparison with the authentic samples. Recently, the stereochemistry of 1 and 2 was revised ( 5 )
Compounds1 and 2 were identified to known hydrolyzabletannins, vescalagin and castalagin(4), respectively, by direct comparisonwith the authentic samples. Recently,the stereochemistry of 1 and 2 was revised( 5 )