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221310-61-8

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221310-61-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221310-61-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,3,1 and 0 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 221310-61:
(8*2)+(7*2)+(6*1)+(5*3)+(4*1)+(3*0)+(2*6)+(1*1)=68
68 % 10 = 8
So 221310-61-8 is a valid CAS Registry Number.

221310-61-8Relevant articles and documents

Synthesis of novel acridino- and phenazino-18-crown-6 ligands and their optically pure dimethyl-substituted analogues for molecular recognition studies

Huszthy, Peter,Samu, Erika,Vermes, Borbala,Mezey-Vandor, Gabriella,Nogradi, Mihaly,Bradshaw, Jerald S.,Izatt, Reed M.

, p. 1491 - 1504 (2007/10/03)

Novel acridino- and phenazino-18-crown-6 ligands 5 and 6 were prepared from acridine-4.5-diol (9) and phenazine-1,9-diol (10) with tetraethylene glycol di-p-tosylate (11) using potassium tert-butoxide as a base in THF. New optically pure dimethyl-substitu

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