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139499-19-7

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139499-19-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 139499-19-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,4,9 and 9 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 139499-19:
(8*1)+(7*3)+(6*9)+(5*4)+(4*9)+(3*9)+(2*1)+(1*9)=177
177 % 10 = 7
So 139499-19-7 is a valid CAS Registry Number.

139499-19-7Relevant articles and documents

Pseudoglycosyltransferase catalyzes nonglycosidic C-N coupling in validamycin a biosynthesis

Asamizu, Shumpei,Yang, Jongtae,Almabruk, Khaled H.,Mahmud, Taifo

experimental part, p. 12124 - 12135 (2011/10/09)

Glycosyltransferases are ubiquitous in nature. They catalyze a glycosidic bond formation between sugar donors and sugar or nonsugar acceptors to produce oligo/polysaccharides, glycoproteins, glycolipids, glycosylated natural products, and other sugar-containing entities. However, a trehalose 6-phosphate synthase-like protein has been found to catalyze an unprecedented nonglycosidic C-N bond formation in the biosynthesis of the aminocyclitol antibiotic validamycin A. This dedicated 'pseudoglycosyltransferase catalyzes a condensation between GDP-valienol and validamine 7-phosphate to give validoxylamine A 7′-phosphate with net retention of the 'anomeric configuration of the donor cyclitol in the product. The enzyme operates in sequence with a phosphatase, which dephosphorylates validoxylamine A 7′-phosphate to validoxylamine A.

Cleavage of Validoxylamine A Derivatives with N-Bromosuccinimide: Preparation of Blocked Synthons Useful for the Construction of Carba-oligosaccharides Composed of Imino-Linkages

Ogawa, Seiichiro,Nakajima, Akihiro,Miyamoto, Yasunobu

, p. 3287 - 3290 (2007/10/02)

Reaction of validoxylamine A and several of its derivatives with N-bromosuccinimide proceeded through cleavage of the imino bonds to give rise to the synthetically useful blocked derivatives of valienamine and validamine, and the cyclohexanone and cyclohe

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