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159770-35-1

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159770-35-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 159770-35-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,9,7,7 and 0 respectively; the second part has 2 digits, 3 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 159770-35:
(8*1)+(7*5)+(6*9)+(5*7)+(4*7)+(3*0)+(2*3)+(1*5)=171
171 % 10 = 1
So 159770-35-1 is a valid CAS Registry Number.

159770-35-1Relevant articles and documents

1,3-Dipolar cycloaddition route to nitrogen heterocyclic triones

Jones, Raymond C. F.,Bhalay, Gurdip,Carter, Paul A.,Duller, Kathryn A. M.,Dunn, Stephen H.

, p. 765 - 776 (2007/10/03)

1,3-Dipolar cycloaddition of nitrile oxides, formed in situ by dehydration of primary nitro compounds, with pyrrolidine enamines of protected γ- or δ-amino-β-keto esters affords isoxazole-4-carboxylates; these undergo lactam formation and N-O bond cleavage to afford 3-acyltetramic acids and 3-acyl-4-hydroxypyridin-2-ones.

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