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128377-12-8

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128377-12-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128377-12-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,3,7 and 7 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 128377-12:
(8*1)+(7*2)+(6*8)+(5*3)+(4*7)+(3*7)+(2*1)+(1*2)=138
138 % 10 = 8
So 128377-12-8 is a valid CAS Registry Number.

128377-12-8Upstream product

128377-12-8Relevant articles and documents

TOTAL SYNTHESIS OF THE MOLLU-SERIES GLYCOSYL CERAMIDES α-D-Manp-(1->3)-β-D-Manp-(1->4)-β-D-Glcp-(1->1)-Cer AND α-D-Manp-(1->3)-2)>-β-D-Manp-(1->4)-β-D-Glcp-(1->1)-Cer

Mori, Masato,Ito, Yukishige,Ogawa, Tomoya

, p. 199 - 224 (2007/10/02)

The mollu-series glycosphingolipids, O-α-D-mannopyranosyl-(1->3)-O-β-D-mannopyranosyl-(1->4)-O-β-D-glucopyranosyl-(1->1)-2-N-tetracosanoyl-(4E)-sphingenine and O-α-D-mannopyranosyl-(1->3)-O-2)>-O-β-D-mannopyranosyl-(1->4)-O-β-D-glucopyranosyl-(1->1)-2-N-tetracosanoyl-(4E)-sphingenine, were synthesized for the first time by using 2,3,4-tri-O-acetyl-D-xylopyranosyl trichloroacetimidate, methyl 2,3,4,6-tetra-O-acetyl-1-thio-α-D-mannopyranoside, benzyl O-(4,6-di-O-benzyl-β-D-mannopyranosyl)-(1->4)-2,3,6-tri-O-benzyl-β-D-glucopyranoside 9, and (2S,3R,4E)-2-azido-3-O-(tert-butyldiphenylsilyl)-4-octadecene-1,3-diol 6 as the key intermediates.The hexa-O-benzyl disaccharide 9 was prepared by coupling two monosaccharide synthons, namely, 2,3-di-O-allyl-4,6-di-O-benzyl-α-D-mannopyranosyl bromide and benzyl 2,3,6-tri-O-benzyl-β-D-glucopyranoside.It was demonstrated that azide 6 was highly efficient as a synthon for the ceramide part in the coupling with both glycotriaosyl and glycotetraosyl donors, particularly in the presence of trimethylsilyl triflate.

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