212248-25-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 212248-25-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,2,2,4 and 8 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 212248-25:
(8*2)+(7*1)+(6*2)+(5*2)+(4*4)+(3*8)+(2*2)+(1*5)=94
94 % 10 = 4
So 212248-25-4 is a valid CAS Registry Number.
212248-25-4Relevant articles and documents
New Intermediates in Synthesis of Provitamins D
Litvinovskaya,Koval',Khripach
, p. 1442 - 1446 (2007/10/03)
The first synthesis of provitamins possessing isoxazole ring in the side chain is described. The synthesis is performed from ergosterol acetate via steroid C22-nitrile oxide by means of 1,3-dipolar cycloaddition of the latter to low-molecular a