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202471-52-1

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202471-52-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 202471-52-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,2,4,7 and 1 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 202471-52:
(8*2)+(7*0)+(6*2)+(5*4)+(4*7)+(3*1)+(2*5)+(1*2)=91
91 % 10 = 1
So 202471-52-1 is a valid CAS Registry Number.

202471-52-1Relevant articles and documents

Preparation of some 5,7-diarylcyclohexeno[3,4-d]-1-selena-2,3-diazolyl-6-spiro-5′-(2′, 3′-pyrazolidine / 2′,3′-oxazo- Lidine)-1,4′-diones and 5,7-diaryl- cyclohexeno[3,4-d]-1-thia-2,3-diazolyl-6spiro-5′(2′,3′- pyrazolidine/2′,3′oxazolidine)-1′,4′-diones

Bhaskar Reddy,Ramana Reddy,Padmavathi

, p. 167 - 171 (2007/10/03)

Synthesis of the title compounds has been accomplished through dimethyl-2,6-diaryl-4-oxocyclohexane-1,1-dicarboxylates 1. The latter on condensation with NH2NH2.H2O and NH2OH.HCl give 6,10-diaryl-2,3-diazaspiro(

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