Three New Ellagic Acid Derivatives from the Bark of Eschweilera coriacea from the Suriname Rainforest
Citations Over Time
Abstract
Bioassay-guided fractionation of Eschweilera coriacea collected in the lowland wet forest of Suriname yielded the new but only weakly active ellagic acid derivative eschweilenol A (1) and the two new but inactive ellagic acid derivatives eschweilenol B (2) and eschweilenol C (3). The four known compounds, sucrose, ellagic acid, 3-O-galloylepigallocatechin, and epigallocatechin, were also isolated. The structures of the three new compounds were determined by spectrometric methods, primarily from the HMQC, HMBC, NOESY, and ROESY NMR techniques, and chemical methods, including methylation and triethylsilylation. The location of a hydroxyl group in one ellagic acid derivative was determined by a new technique involving an NOE correlation of the protons of a triethylsilyl derivative with a proton on a neighboring aromatic ring.
Related Papers
- → Cytotoxic Manoalide-Type Sesterterpenes from the Sponge Luffariella variabilis Collected in the South China Sea(2020)21 cited
- → Premnalatifolin A, a novel dimeric diterpene from Premna latifolia Roxb(2011)35 cited
- → Identification and Quantification of Polyphenolic Secondary Metabolites in Stem Bark of Ficus religiosa (Moraceae) Using UPLC-HRMS and RP-HPLC-PDA(2023)9 cited
- → Corymbulosins D–H, 2-Hydroxy- and 2-Oxo-clerodane Diterpenes from the Bark of Laetia corymbulosa(2017)10 cited
- → ChemInform Abstract: Eight New Diterpenoids from Soft Coral Cespitularia hypotentaculata.(2008)