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4257-96-9

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4257-96-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4257-96-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,2,5 and 7 respectively; the second part has 2 digits, 9 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 4257-96:
(6*4)+(5*2)+(4*5)+(3*7)+(2*9)+(1*6)=99
99 % 10 = 9
So 4257-96-9 is a valid CAS Registry Number.

4257-96-9Relevant articles and documents

PROCESS OF SYNTHESIS OF β-6'SULFOQUINOVOSYL DIACYLGLYCEROLS

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Page/Page column 11; 12, (2022/02/28)

The present invention relates to a synthesis process of β-6-sulfoquinovosyl-diacylglycerols. In particular, said process is for the synthesis of the compounds 1,2-O-distearoyl-3-O-(β- sulfoquinovosyl)-R/S-glycerol, 1,2-O-distearoyl-3-O-(β-sulfoquinovosyl)-R-glycerol or 1,2- O-distearoyl-3-O-(β-sulfoquinovosyl)-S-glycerol, named respectively Sulfavant A, Sulfavant R and Sulfavant S.

Selectivity of 1-O-Propargyl-D-Mannose Preparations

?ezanka, Michal,Dolensky, Bohumil,Krabicová, Ilona

, (2022/03/01)

Thanks to their ability to bind to specific biological receptors, mannosylated structures are examined in biomedical applications. One of the most common ways of linking a functional moiety to a structure is to use an azide-alkyne click reaction. Therefore, it is necessary to prepare and isolate a propargylated mannose derivative of high purity to maintain its bioactivity. Three known preparations of propargyl-α-mannopyranoside were revisited, and products were analysed by NMR spectroscopy. The preparations were shown to yield by-products that have not been described in the literature yet. Our experiments showed that one-step procedures could not provide pure propargyl-α-mannopyranoside, while a three-step procedure yielded the desired compound of high purity.

Isolation and characterization of triterpenoid saponins from leaves of Aralia nudicaulis L

Lavoie, Serge,Pierra, Julie,Legault, Jean,Raminoson, Diamondra,Lion, Quentin,Mshvildadze, Vakhtang,Pichette, André

, p. 184 - 189 (2021/04/23)

Three new oleanolic glycosides (1–3), along with seven known saponins from various plants (4–10) were isolated for the first time from the leaves of Aralia nudicaulis. Their structures were elucidated on the basis of spectroscopic evidence, including 1D and 2D NMR, and HRESIMS. Nudicauloside A and B (1–2) have shown moderate anti-inflammatory activity, as demonstrated by inhibition of LPS-induced NO production in raw 264.7 murine macrophages (IC50 = 74–101 μM).

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