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201540-22-9

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201540-22-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 201540-22-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,1,5,4 and 0 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 201540-22:
(8*2)+(7*0)+(6*1)+(5*5)+(4*4)+(3*0)+(2*2)+(1*2)=69
69 % 10 = 9
So 201540-22-9 is a valid CAS Registry Number.

201540-22-9Upstream product

201540-22-9Downstream Products

201540-22-9Relevant academic research and scientific papers

Synthesis of ginsenoside Rg3, a minor constituent of Ginseng radix.

Anufriev,Malinovskaya,Denisenko,Uvarova,Elyakov,Kim,Baek

, p. 179 - 182 (1997)

Glycosylation of 12beta-acetoxy-dammar-24-en-3beta,20(S)-diol (4), with hepta-O-acetyl-alpha-sophorosyl bromide (5) under catalysis by Ag2CO3 or Ag2O afforded a chromatographically unseparated mixture of the alpha- and beta-linked octaacetates 6 and 7 in an approximately 2.5:1 ratio. After deprotection and chromatographic purification, the free alpha- (8) and beta-glycosides (9) were obtained. Sophoroside 9 was identical in all respects with ginsenoside Rg3, the minor component of Ginseng Radix rubra. All compounds were fully characterized by 1H and 13C NMR spectroscopy.

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