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177779-54-3

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177779-54-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 177779-54-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,7,7,7 and 9 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 177779-54:
(8*1)+(7*7)+(6*7)+(5*7)+(4*7)+(3*9)+(2*5)+(1*4)=203
203 % 10 = 3
So 177779-54-3 is a valid CAS Registry Number.

177779-54-3Relevant articles and documents

Synthesis and 1H and 13C NMR spectral characteristics of 8-bromo-2′,3′-dideoxyguanosine and 8-bromo-2′,3′-dideoxyinosine

Zeidler, Joanna,Golankiewicz, Bozenna

, p. 1077 - 1095 (1996)

Reaction of 2′,3′-dideoxyguanosine 1a as 5′-O-tert-butyldimethylsilyl derivative 1b and 2′,3′-dideoxyinosine 2a with bromine in acetate buffer conducted in heterogeneous medium afforded 8-bromo-2′,3′-dideoxyguanosine 3a (44% after deprotection) and 8-bromo-2′,3′-dideoxyinosine 4a (12%) respectively. The change of conformational preferences anti → syn on 8-bromo substitution of 2′,3′-dideoxynucleosides is reflected in the 1H and 13C NMR spectra by characteristic shifts of H-2′, H-3′, C-2′ and C-3′ signals.

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