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1257821-12-7

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1257821-12-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1257821-12-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,7,8,2 and 1 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1257821-12:
(9*1)+(8*2)+(7*5)+(6*7)+(5*8)+(4*2)+(3*1)+(2*1)+(1*2)=157
157 % 10 = 7
So 1257821-12-7 is a valid CAS Registry Number.

1257821-12-7Downstream Products

1257821-12-7Relevant articles and documents

Cyclopenta[a]quinolizine: A novel pseudoazulene with a bridgehead nitrogen atom

Gormay, Pavel V.,Rybakov, Victor B.,Babaev, Eugene V.

experimental part, p. 5364 - 5368 (2010/11/18)

Cyclopenta[a]quinolizine, a novel tricyclic pseudoazulene, was prepared by reaction of cyclopentadienyllithium with oxazolo[3,2-a]pyridimum or substituted pyridinium salts. Structural analysis (X-ray analysis, NMR and UV spectroscopy) and DFT calculations confirm its highly dipolar nature (due to derealization of the negative charge around the five-membered ring) combined with partial localization of bonds in both six-membered rings.

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