28456-25-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 28456-25-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,4,5 and 6 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 28456-25:
(7*2)+(6*8)+(5*4)+(4*5)+(3*6)+(2*2)+(1*5)=129
129 % 10 = 9
So 28456-25-9 is a valid CAS Registry Number.
28456-25-9Relevant academic research and scientific papers
Structure-activity studies of fentanyl
Casy,Huckstep
, p. 605 - 608 (2007/10/02)
The preparation of analogues of fentanyl with para substituents in the anilino aromatic ring, anilino nitrogen separated from phenyl by methylene or bimethylene, and phenacyl replacing propionyl as the N-acyl substituent is reported. Although all para sub
