57203-25-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 57203-25-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,2,0 and 3 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 57203-25:
(7*5)+(6*7)+(5*2)+(4*0)+(3*3)+(2*2)+(1*5)=105
105 % 10 = 5
So 57203-25-5 is a valid CAS Registry Number.
57203-25-5Relevant articles and documents
One-Pot Synthesis of Unsymmetrically Substituted 2,4-Dialkylisoflavenes
Alberola, Angel,Andres, Celia,Ortega, Alfonso Gonzalez,Pedrosa, Rafael,Vicente, Martina
, p. 1781 - 1783 (2007/10/02)
The trimethylsilyl derivative of formonometine reacts sequentially with two different organometallic derivatives to afford regiospecifically and with good yield 2,4-dialkylisoflavenes unsymmetrically substituted.
