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71841-57-1

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71841-57-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 71841-57-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,8,4 and 1 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 71841-57:
(7*7)+(6*1)+(5*8)+(4*4)+(3*1)+(2*5)+(1*7)=131
131 % 10 = 1
So 71841-57-1 is a valid CAS Registry Number.

71841-57-1Relevant articles and documents

Stereospecific Synthesis of 4,8-Dimethylspiro(4,5)-deca-7-ene-1,6-dione. A Synthetic Route to the Acorance

Michelotti, E. L.,Sanchez, E. L.

, p. 497 - 500 (2007/10/02)

A stereospecific synthesis of 4,8-dimethylspiro(4,5)-deca-7-ene-1,6-dione from 4,7-dimethylcoumarine in high yield is reported.The configuration of this product is established according to its 1H NMR and 13C NMR data. - Keywords: Spirocyclisation, Acorane

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