2361-05-9

Upstream product

• 121903-96-6 gymnemic acid IV 
• 122074-65-1 gymnemic acid III 
• 122168-40-5 gymnemic acid I 
• 122144-48-3 gymnemic acid II 
• 121686-42-8 3-O-β-D-glucuronopyranosyl gymnemagenin 
• 95962-96-2 21-O-(4-O-acetyl-3-O-angeloyl)-β-D-fucopyranosyl-22-O-acetyl protoaescigenin 

Downstream Products

• 22488-10-4 16β,28-di-O-acetyl-3β,23;21β,22α,-di-O-isopropylidene-gymnemagenin 
• 22488-09-1 C₃₆H₅₈O₆ 
• 7047-45-2 pentaacetate of protoaescigenin 

Relevant academic research and scientific papers

STRUCTURE STUDIES OF NEW ANTISWEET CONSTITUENT FROM GYMNEMA SYLVESTRE

Gymnemic acid I, II, III and IV have been isolated from hot water extract of leaves of Gymnema sylvestre R.Br. as antisweet principles.The whole structure were determined by chemical and spectroscopic means.

ESTABLISHMENT OF THE STRUCTURE OF GYMNEMAGENIN BY X-RAY ANALYSIS AND THE STRUCTURE OF DEACYLGYMNEMIC ACID

The strucuture of gymnemagenin, the sapogenin of antisweet principle of Gymnema syrvestre, was firmly established as 3β,16β,21β,22α,23,28-hexahydroxy-olean-12-ene by the X-ray analysis of the 3β,23;21β,22α-di-O-isopropylidine derivative.On the basis of this result, the structure of deacylgymnemic acid was elucidated as the 3-O-β-glucuronide by comparison of the 13C-NMR spectra.

Studies on the Constituents of Xanthoceras sorbifolia BUNGE. III. Minor Prosapogenins from the Fruits of Xanthoceras sorbifolia BUNGE

The prosapogenins from the fruits of Xanthoceras sorbifolia BUNGE (Sapindaceae) were examined.On the basis of chemical and spectral analyses, the structures of three minor prosapogenins, obtained by acid hydrolysis of crude saponin fraction, were characterized as 21-O-(3,4-di-O-angeloyl)-β-D-fucopyranosyl theasapogenol B (1), 21-O-(4-O-acetyl-3-O-angeloyl)-β-D-fucopyranosyl theasapogenol B (2) and 21-O-(4-O-acetyl-3-O-angeloyl)-β-D-fucopyranosyl-22-O-acetyl protoaescigenin (3), respectively.