18463-81-5

Upstream product

• 127277-50-3 C₈₈H₅₆N₂O₅₀ 
• 142569-80-0 C₄₇H₃₀N₂O₂₄ 
• 135326-03-3 C₇₄H₅₂N₂O₄₂ 
• 131959-66-5 C₄₀H₂₈N₂O₂₀ 
• 131959-73-4 C₅₄H₃₄N₂O₂₉ 
• 131997-79-0 C₅₄H₃₄N₂O₂₉ 
• 186581-53-3 diazomethane 

Downstream Products

• 18720-00-8 2,3-bis-benzoyloxy-chromeno[5',4',3':3,4,5]chromeno[7,8-b]quinoxaline-5,14-dione 

Relevant academic research and scientific papers

TWO NEW ELLAGITANNIN METABOLITES, CARPINUSIN AND CARPINUSNIN FROM CARPINUS LAXIFLORA

From the fresh leaves of Carpinus laxiflora (Betulaceae), two new hydrolyzable tannins, carpinusin (2) and carpinusnin (3), have been isolated, together with thirteen known hydrolyzable tannins and related compounds, and their structures were elucidated on the basis of physico-chemical evidence.

Tannins and Related Polyphenols of Euphorbiaceous Plants. IV. Euphorbins A and B, Novel Dimeric Dehydroellagitannins from Euphorbia hirta L.

Two new dimeric dehydroellagitannins, named euphorbin A (6) and euphorbin B (7), were isolated from the aerial parts of Euphorbia hirta, and their structures, containing 4C1 and 1C4 glucopyranose residues and a dehydrohexahydroxydiphenoyl group, were elucidated on the basis of chemical and spectral studies.Five monomeric hydrolizable tannins, i.e., 2,4,6-tri-O-galloyl-D-glucose, 1,3,4,6-tetra-O-galloyl-β-D-glucose, 1,2,3,4,6-penta-O-galloyl-β-D-glucose, geraniin and terchebin, as well as two quinic acid esters, i.e., 5-O-caffeoylquinic acid and 3,4-di-O-galloylquinic acid, and three flavonol glycosides were also isolated.Keywords - Euphorbia hirta; Euphorbiaceae; tannin; dimeric hydrolyzable tannin; euphorbin A; euphorbin B; dehydrohexahydroxydiphenoyl group; dehydroellagitannin