103744-89-4

Upstream product

• 77-78-1 dimethyl sulfate 

Downstream Products

• 1916-07-0 3,4,5-trimethoxybenzoic acid methyl ester 
• 4891-62-7 4,5,6,4',5',6'-Hexamethoxy-biphenyl-2,2'-dicarboxylic acid dimethyl ester 
• 147197-31-7 4,5,6,4',5',6',4'',5'',6''-nonamethoxy-m-terphenyl-2,2',2''-tricarboxylic acid trimethyl ester 
• 116976-32-0 methyl (S)-heptamethylflavogallonate 
• 103744-91-8 C₆₆H₆₈O₃₁ 

Relevant academic research and scientific papers

Tannins and Related Compounds. LI. Elucidation of the Stereochemistry of the Triphenoyl Moiety in Castalagin and Vescalagin, and Isolation of 1-O-Galloyl Castalagin from Eugenia grandis

The chirality of the nonahydroxytriphenoyl group in castalagin (1) and vescalagin (2) was determined to be in the S,S-series on the basis of circular dichroism analysis.In addition, a new ellagitannin (4) has been isolated from the leaves of Eugenia grandis (Myrtaceae), and the structure was established to be 1-O-galloyl castalagin on the basis of chemical and spectroscopic evidence. Keywords --- castalagin; vescalagin; C-glycosidic ellagitannin; atropisomerism; absolute stereochemistry; nonahydroxytriphenoyl group; flavogallonic acid; Eugenia grandis; 1-O-galloyl castalagin

Tannins and Related Compounds. XLII. Isolation and Characterization of Four New Hydrolyzable Tannins, Terflavins A and B, Tergallagin and Tercatain from the Leaves of Terminalia catappa L.

A chemical examination of the leaves of Terminalia catappa L. (Combretaceae) has led to the isolation and characterization of four new hydrolyzable tannins named terflavins A (1) and B (2), tergallagin (3) and tercatain (4), together with eight known tannins: punicalin (5), punicalagin (6), chebulagic acid (7), geraniin (8), granatin B (9), l-desgalloyleugeniin (10), corilagin (11) and 2,3--D-glucose (12).Terflavins A (1) and B (2) posses novel structures in which a flavogallonyl (triphenyl) ester group is single bonded to the glucopyranose ring, and are presumed to be biosynthetic precursors of punicalagin (6) and punicalin (5), respectively, while tergallagin (3), which contains a gallagyl (tetraphenyl) group and a unique tergalloyl ester group attached to the glucose moiety, seems to be formed biosynthetically from punicalagin (6).Keyword - Terminalia Cattapa; Combretaceae; terflavin A; terflavin B; tercatain; hydrolyzable tannin; tergallic acid; flavogallonic acid; biosynthesis