203052-81-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 203052-81-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,3,0,5 and 2 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 203052-81:
(8*2)+(7*0)+(6*3)+(5*0)+(4*5)+(3*2)+(2*8)+(1*1)=77
77 % 10 = 7
So 203052-81-7 is a valid CAS Registry Number.
203052-81-7Relevant articles and documents
1,3-Dipolar cycloaddition route to oxygen heterocyclic triones
Jones, Raymond C. F.,Duller, Kathryn A. M.,Vulto, Simone I. E.
, p. 411 - 416 (2007/10/03)
1,3-Dipolar cycloadditon of nitrite oxides, formed in situ by dehydration of primary nitro compounds, with pyrrolidine enamines of protected γ-hydroxy-β-keto esters affords isoxazole-4-carboxylates; these are subjected to N-O bond cleavage and lactonisati
