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176842-74-3

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176842-74-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 176842-74-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,6,8,4 and 2 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 176842-74:
(8*1)+(7*7)+(6*6)+(5*8)+(4*4)+(3*2)+(2*7)+(1*4)=173
173 % 10 = 3
So 176842-74-3 is a valid CAS Registry Number.

176842-74-3Relevant articles and documents

Syntheses of triglycosyl tetrapeptides and a hexaglycosyl tetrapeptide

Takeda, Tadahiro,Kanemitsu, Takuya,Shimizu, Noriko,Ogihara, Yukio,Matsubara, Machiko

, p. 81 - 93 (1996)

A stereo-controlled synthesis of the model compound for the phytoalexin elicitor-active glycoprotein is described. Glycosylation of the trisaccharide, 2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl-(1 → 6)-2,3,4-tri-O-acetyl-α-D-mannopyranosyl-(1 → 6)-2,3,4-tri-O-acetyl-α-D-mannopyranosyl trichloroacetimidate (12), with N-(9-fluorenylmethoxycarbonyl)-L-seryl-L-proline benzyl ester (3) or N-(carbobenzoxy)-L-seryl-L-proline methyl ester (4) by use of BE3 · OEt2 gave the triglycosyl-seryl-proline derivatives. The N- as well as C-terminus of these triglycosyl dipeptides could be deblocked selectively to give compounds 14 and 16, which are versatile intermediates for the completion of model compound synthesis of glycopeptide. Triglycosyl tetrapeptides (18, 21) and hexaglycosyl tetrapeptide (23) have been prepared by the convergent block synthesis.

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