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213191-99-2

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213191-99-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 213191-99-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,3,1,9 and 1 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 213191-99:
(8*2)+(7*1)+(6*3)+(5*1)+(4*9)+(3*1)+(2*9)+(1*9)=112
112 % 10 = 2
So 213191-99-2 is a valid CAS Registry Number.

213191-99-2Downstream Products

213191-99-2Relevant articles and documents

Synthesis of Lex and Ley oligosaccharides with azido-type spacer-arms. Comparison of 3- and 4-methoxybenzyl groups as key temporary protective groups

Figueroa Pérez, Santiago,González Lio, Raul,Fernández Santana, Violeta,Verez Bencomo, Vicente

, p. 835 - 850 (1998)

5-Azido-3-oxa-1-pentanol was prepared from 2-(2-chloroethoxy)ethanol and used as a spacer in the chemical synthesis of the trisaccharide β-D-Gal-(1→4)-[α-L-Fuc-(1-→3)]-GlcNAc and the tetrasaccharide α-L-Fuc-α-(1→2)-β-D-Gal-(1→4)-[α-L-Fuc- (1→3)]-GlcNAc that represent the epitopes defining the human blood groups Lex and Ley. The classical 4-methoxybenzyl group and the remarably acid-stable 3-methoxybenzyl group were compared as temporary protective groups for position 3 at the glucosamine unit to circumvent the problems associated with the simultaneous presence of allyl and azido groups. The resulting oligosaccharides were coupled to proteins with high efficiency.

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