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389811-95-4

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389811-95-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 389811-95-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,8,9,8,1 and 1 respectively; the second part has 2 digits, 9 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 389811-95:
(8*3)+(7*8)+(6*9)+(5*8)+(4*1)+(3*1)+(2*9)+(1*5)=204
204 % 10 = 4
So 389811-95-4 is a valid CAS Registry Number.

389811-95-4Relevant articles and documents

Solid-phase synthesis of a branched hexasaccharide using a highly efficient synthetic strategy

Roussel,Takhi,Schmidt

, p. 8540 - 8548 (2007/10/03)

The solid-phase synthesis of branched lacto-N-neohexaose derivative 1 occurring in human milk is described. The new building block of lactose 3 bearing the orthogonal temporary hydroxy protecting groups 9-fluorenylmethyloxycarbonyl (Fmoc) and levulinoyl (Lev) has been prepared. Its use, together with that of lactosamine donor 4, glucosamine donor 5, and O-galactosyl trichloroacetimidate 6, has enabled the preparation of hexasaccharide 22 following two different approaches in excellent overall yield (43%, 90% per step over eight steps). An additional key feature of this work is the successful use of newly prepared ester-type linker 2, having a benzylic spacer connected to the anomeric oxygen. This linker presents the advantage of producing a benzylic anomeric moiety after cleavage from the polymer support, which could be easily removed to obtain the unprotected oligosaccharide 1.

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