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1257236-80-8

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1257236-80-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1257236-80-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,7,2,3 and 6 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1257236-80:
(9*1)+(8*2)+(7*5)+(6*7)+(5*2)+(4*3)+(3*6)+(2*8)+(1*0)=158
158 % 10 = 8
So 1257236-80-8 is a valid CAS Registry Number.

1257236-80-8Relevant articles and documents

DIBENZOTHIOPHENE DERIVATIVES AS DNA- PK INHIBITORS

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Page/Page column 62, (2010/12/26)

Compound formula I: wherein: X1 and X2 may be either (a) C and O, (b) N and N, or (c) C and NH, where the dotted bonds represents a double bond in the appropriate location; R1 and R2 are independently selected from hydrogen, an optionally substituted C1-7 alkyl group, an optionally substituted C3-20 heterocyclyl group, or an optionally substituted C5-20 aryl group, or may together form, along with the nitrogen atom to which they are attached, an optionally substituted heterocyclic ring having from 4 to 8 ring atoms; RN1 is selected from hydrogen and an optionally substituted C1-4 alkyl group; RC1 is selected from an optionally substituted C1-7 alkyl group, an optionally substituted C3-20 heterocyclyl group, or an optionally substituted C5-20 aryl group; or RN1 and RC1 may together form an optionally substituted C2-4 alkylene group.

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