157717-83-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 157717-83-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,7,1 and 7 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 157717-83:
(8*1)+(7*5)+(6*7)+(5*7)+(4*1)+(3*7)+(2*8)+(1*3)=164
164 % 10 = 4
So 157717-83-4 is a valid CAS Registry Number.
157717-83-4Relevant academic research and scientific papers
Total Synthesis of (+)-Carbonolide B
Keck, Gary E.,Palani, Anandan,McHardy, Stanton F.
, p. 3113 - 3122 (2007/10/02)
The macrolide (+)-carbonolide B, the aglycon of the antibiotic carbomycin B, was synthesized via a convergent sequence.A key step of the approach is the union of aldehyde 6 with stannane 7 in the presence of MgBr2*OEt2 as Lewis acid to afford the C1-C9 fr
