205442-04-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 205442-04-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,5,4,4 and 2 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 205442-04:
(8*2)+(7*0)+(6*5)+(5*4)+(4*4)+(3*2)+(2*0)+(1*4)=92
92 % 10 = 2
So 205442-04-2 is a valid CAS Registry Number.
205442-04-2Relevant articles and documents
A stereoselective synthesis of 4-O-methyl-13-desacetyl-12,13-di-o-benzylcarzinophilin
Hashimoto, Masaru,Terashima, Shiro
, p. 59 - 64 (2007/10/03)
The title synthesis was achieved by the synthetic scheme featuring the following four key steps: i) coupling of the methyl thioimidate with the 2-oxazolin-5-one (5+6→13), ii) construction of the C17-C21 functionality by the use of Sharpless asymmetric dih