29127-26-2

Upstream product

• 77-78-1 dimethyl sulfate 
• 154-23-4 catechin 
• 240487-88-1 C₃₇H₃₈O₁₂ 
• 88197-03-9 (2R,3S)-catechin 7-O-β-D-glucopyranoside 
• 240423-33-0 C₃₆H₃₆O₁₂ 
• 65597-49-1 (2S,3R,4S,5S,6R)-2-[(2R,3S)-2-(3,4-Dimethoxy-phenyl)-3-hydroxy-5-methoxy-chroman-7-yloxy]-6-hydroxymethyl-tetrahydro-pyran-3,4,5-triol 

Downstream Products

• 51079-25-5 (2R,3S)-(+)-catechin 3',4',5,7-tetramethyl ether 

Relevant academic research and scientific papers

7-O-GALLOYL-(+)-CATECHIN AND 3-O-GALLOYLPROCYANIDIN B-3 FROM SANGUISORBA OFFICINALIS

7-O-Galloyl-(+)-catechin and 3-O-galloylprocyanidin B-3, along with gambiriins A-1 and B-3 and four polygalloylglucoses, have been isolated from the root and rhizome of Sanguisorba officinalis.Key Word Index - Sanguisorba officinalis; Rosaceae; tannins; flavan-3-ol gallate; procyanidin gallate; gambiriins; galloylglucoses.

A-type proanthocyanidins from peanut skins

Six A-type proanthocyanidins were isolated from the water-soluble fraction of peanut skins. On the basis of spectral data, reductive cleavage with sodium cyanoborohydride, and chiral HPLC analysis, three new compounds, epicatechin-(2β → O → 7, 4β → 6)-catechin, epicatechin-(2β → O → 7, 4β → 6)-ent-catechin and epicatechin-(2β → O → 7, 4β → 6)-ent- epicatechin were unambiguously identified, together with the three known compounds, proanthocyanidin A-1, proanthocyanidin A-2 and epicatechin-(2β → O → 7, 4β → 8)-ent-epicatechin. 13C NMR chemical shift rules to distinguish between [2 → O → 7, 4 → 8] and [2 → O → 7,4 → 6] double- linked heptamethyl ethers of A-type proanthocyanidins are proposed. Bioassay experiments showed that these six compounds possess substantial activity against hyaluronidase.