Monomeric and dimeric hydrolysable tannins of Tamarix nilotica

The ellagitannin monomer, nilotinin M1, and three dimers, nilotinins D1, D2, and D3, were isolated from leaves of Tamarix nilotica (Ehrenb.) Bunge. Structures were elucidated based on the analysis of spectroscopic data and chemical correlations with known compounds.