82220-66-4

Upstream product

• 186581-53-3 diazomethane 
• 82203-02-9 nonacosa-O-methylagrimoniin 
• 67-56-1 methanol 
• 1968-71-4 methyl 2-bromo-3,4,5-trimethoxybenzoate 
• 83011-43-2 3-hydroxy-4,5-dimethoxybenzoate 
• 124-41-4 sodium methylate 
• 124166-22-9 C₁₁₁H₁₁₆O₅₂ 
• 82203-01-8 agrimoniin 
• 77-78-1 dimethyl sulfate 
• 182183-12-6 3,4-Dihydroxy-2-(2-hydroxy-3-methoxy-5-methoxycarbonyl-phenoxy)-5-methoxy-benzoic acid methyl ester 
• 74-88-4 methyl iodide 

Downstream Products

• 68793-32-8 3,4,5,4',5'-pentamethoxy-2,3'-oxy-di-benzoic acid 
• 59252-29-8 trimethyl octa-O-methylvaloneate 
• 82203-13-2 trimethyl octa-O-methylsanguisorboate 
• 131959-68-7 trimethyl octa-O-methyl-macaranate 

Relevant academic research and scientific papers

Euscaphinin, a new ellagitannin dimer from Euscaphis japonica (Thunb.) Kanitz

A new ellagitannin dimer named euscaphinin was isolated from the leaves of Euscaphis japonica (Thunb.) Kanitz. The structure of this dimer was determined on the basis of spectroscopic and chemical evidence. The resulting structure indicated that it was pr

Galloyl-derived orthoquinones as reactive partners in nucleophilic additions and Diels-Alder dimerizations: A novel route to the dehydrodigalloyl linker unit of agrimoniin-type ellagitannins

Orthochloranil-mediated oxidation of galloyl monoethers furnishes the derived orthoquinones in excellent yield. These reactive electrophiles participate in a variety of nucleophilic addition reactions with heteroatomic and carbanionic partners. In addition, Lewis acid-mediated dimerization of the orthoquinones provides an efficient route to dehydrodigalloyl-type diaryl ether units characteristic of several ellagitannin natural products. The implications for ellagitannin biosynthesis and gallotannin-protein covalent attachment are discussed.

Tannins and Related Compounds. LXXIX. Isolation and Characterization of Novel Dimeric and Trimeric Hydrolyzable Tannins, Nuphrins C, D, E and F, from Nuphar japonicum DC.

Four novel dimeric and trimeric hydrolyzable tannins, nupharins C (1), D, (13), E (15) and F (16), which possess a less favorable α-D-glucopyranose core with an atropisomeric (R)- or (S)-hexahydrodiphenoyl group at the 3,6-position, have been isolated from the rhizomes of Nuphar japonicum DC. (Nymphaeaceae).The structures of these compounds were established on the basis of spectroscopic and chemical evidence.Keywords - Nuphar japonicum; Nymphaeaceae; nupharin C-F; dimeric ellagitannin; trimeric ellagitannin; dehydrodigallic acid; α-D-glucose; R-, S-hexahydrodiphenoic acid; atropisomerism; diastereomer

Agrimoniin and Potentillin, an Ellagitannin Dimer and Monomer having an α-Glucose Core

Potentillin (3), which has an α-glucosyl linkage, and its dimer, agrimoniin (1) have been isolated from Agrimonia pilosa Ledeb. and Potentilla kleiniana Wight et Arnott., and their structures elucidated.