639476-09-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 639476-09-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,9,4,7 and 6 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 639476-09:
(8*6)+(7*3)+(6*9)+(5*4)+(4*7)+(3*6)+(2*0)+(1*9)=198
198 % 10 = 8
So 639476-09-8 is a valid CAS Registry Number.
639476-09-8Relevant articles and documents
Synthesis of a New Stable Conformationally Constrained 2,7-Anhydrosialic Acid Derivative
Liu, Ke-Gang,Zhou, Hai-Bin,Wu, Yu-Lin,Yao, Zhu-Jun
, p. 9528 - 9531 (2007/10/03)
A stereoseletive synthesis of 2,7-anhydrosialic acid derivative 18 was achieved from D-glucono-δ-lactone. A highly syn-selective addition of Grignard reagent to the N-benzylimine 8 served as a key step.