497239-27-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 497239-27-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,9,7,2,3 and 9 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 497239-27:
(8*4)+(7*9)+(6*7)+(5*2)+(4*3)+(3*9)+(2*2)+(1*7)=197
197 % 10 = 7
So 497239-27-7 is a valid CAS Registry Number.
497239-27-7Relevant articles and documents
SPIRO COMPOUNDS
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Page 139, (2008/06/13)
Compounds of the formula (I): (whereinA is an optionally substituted straight-chain hydrocarbon having 1 to 6 carbon atoms, which is optionally intervened by oxygen or nitrogen atom;Ar1 is aryl or heteroaryl, any of which is optionally substitu