639512-99-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 639512-99-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,9,5,1 and 2 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 639512-99:
(8*6)+(7*3)+(6*9)+(5*5)+(4*1)+(3*2)+(2*9)+(1*9)=185
185 % 10 = 5
So 639512-99-5 is a valid CAS Registry Number.
639512-99-5Relevant articles and documents
Synthesis of unsaturated [1,2]oxazines by using sigmatropic rearrangements and the ring-closing metathesis reaction
Le Flohic, Alexandre,Meyer, Christophe,Cossy, Janine,Desmurs, Jean-Roger
, p. 8577 - 8580 (2007/10/03)
Various substituted unsaturated [1,2]oxazines have been synthesized by using a [2,3]- or a [3,3]-sigmatropic rearrangement and a ring-closing metathesis reaction as key steps.
