199919-22-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 199919-22-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,9,9,1 and 9 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 199919-22:
(8*1)+(7*9)+(6*9)+(5*9)+(4*1)+(3*9)+(2*2)+(1*2)=207
207 % 10 = 7
So 199919-22-7 is a valid CAS Registry Number.
199919-22-7Relevant articles and documents
Studies on the synthesis of highly substituted furans: The synthesis of calicogorgins A and C
MaGee, David I.,Leach, James D.,Mallais, Tammy C.
, p. 1289 - 1292 (2007/10/03)
A short and highly efficient synthesis of calicogorgin A and C has been accomplished. The key features include a rapid assembly of the furanyl moieties, a sulfonyl anion alkylation to join the two halves and a bis-reductive desulfurization.
