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173267-21-5

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173267-21-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 173267-21-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,3,2,6 and 7 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 173267-21:
(8*1)+(7*7)+(6*3)+(5*2)+(4*6)+(3*7)+(2*2)+(1*1)=135
135 % 10 = 5
So 173267-21-5 is a valid CAS Registry Number.

173267-21-5Relevant articles and documents

Trifluoromethanesulfonic Anhydride-4-(N,N-Dimethylamino)pyridine as a Reagent Combination for Effecting Bischler-Napieralski Cyclisation under Mild Conditions: Application to Total Syntheses of the Amaryllidaceae Alkaloids N-Methylcrinasiadine, Anhydrolyc

Banwell, Martin G.,Bissett, Brett D.,Busato, Stefan,Cowden, Cameron J.,Hockless, David C. R.,et al.

, p. 2551 - 2554 (1995)

A combination of triflic anhydride and 4-(N,N-dimethylamino)pyridine effects Bischler-Napieralski cyclisation of β-phenethylcarbamates and β-phenethylamides under very mild conditions.

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